Table of Contents
Building your own periscope is a fascinating venture that invites you to understand the underlying principles of light and reflection. It’s a hands-on project that merges the creativity of crafting with the precision of science. As you embark on this journey, you’ll gain insight into how reflective surfaces bend light, allowing you to see over walls or around corners.

Creating a periscope involves more than just sticking a couple of mirrors together; it’s about understanding how light travels and interacts with materials. By delving into this project, you’re constructing a device and uncovering the science that makes periscopes an essential tool in various fields. Moreover, you’ll learn to refine your design for optimal viewing clarity and experiment with angles to enhance your periscope’s effectiveness.
Michelle Connolly, a pioneer in the field of educational resources with 16 years of classroom experience, explains, “Building a periscope from scratch empowers students to engage with scientific concepts in a practical, enjoyable manner, reinforcing learning through doing.”
The Science of Light and Reflection
Before you embark on building your own periscope, it’s crucial to understand how light behaves and the principles of reflection. This knowledge will underpin the design and functionality of your periscope.
Fundamentals of Light
Light is a form of energy that travels in straight lines. When light from a source, such as the Sun, strikes an object, it can be reflected, absorbed, or transmitted. The speed at which light travels is approximately 299,792 kilometres per second, commonly rounded up to 300,000 km/s.
Reflection and Its Laws
Reflection occurs when light bounces off a surface. There are two types of reflection: specular, where light reflects in a single direction, and diffuse, where light scatters in multiple directions. The law of reflection states that the angle of incidence is equal to the angle of reflection. This means that if light strikes a surface at a 45-degree angle, it will reflect off at the same angle.
Michelle Connolly, founder of LearningMole and an educational consultant with a rich 16-year tenure in the classroom, insightfully remarks, “When children comprehend the science of how light interacts with surfaces, they gain a powerful foundation for creating optical tools like periscopes. It’s about seeing the unseen, understanding how invisible light rays can be harnessed to broaden one’s view of the world.”
Remember, this basic understanding is not just scientific knowledge, but the first step in practical application that will allow you to craft an instrument that bends light, enabling you to see over and around obstacles.
Designing a Periscope
Before you embark on the journey of constructing your very own type, it’s essential to understand the fundamentals of its design and the materials suited for building one.
Understanding Periscope Design
A periscope is an optical instrument that is predominantly used to observe objects from a hidden position. The key to its design is the placement of two mirrors or reflective surfaces at a precise 45-degree angle inside a tube. This setup allows light from an object to be reflected down to the viewer. Most designs are tubular and employ a straight-line path for light through the device.
The design process involves not just the physical architecture of the periscope but also the understanding of light and reflection principles. “In constructing, it’s critical to factor in how light interacts with the mirrors to ensure a clear image is produced,” says Michelle Connolly, an educational consultant with 16 years of classroom experience.
Choosing the Right Materials
The choice of materials is vital for creating a functional periscope. Common materials include:
- Cardboard: A popular choice for DIY periscope projects due to its accessibility and ease of manipulation.
- PVC pipe: Offers a sturdier structure and can be used for a more durable one.
For the reflective surfaces, you can use:
- Mirrors: Standard small rectangular mirrors are often used, as they provide the clearest image.
- Alternative reflective materials: In the absence of mirrors, any highly reflective surface can be used, though this might affect the quality of the image.
Remember to consider the size of your tube and mirrors; they should be compatible so that the light easily reflects from one mirror to the other without obstruction. By choosing the right materials, you will be able to enjoy designing and building a periscope that functions effectively and provides a hands-on understanding of the physics of light and reflection.
Creating the Structure
Building your own periscope is a rewarding project that involves crafting the body from simple materials like cardboard or PVC pipe and carefully installing mirrors to capture and reflect light.
Assembling the Body
To construct the body, follow these steps:
- Choose a durable material such as cardboard or PVC pipe. For a cardboard periscope, find two long, rectangular pieces that can be joined to form a hollow tube. If you’re using a PVC pipe, two straight lengths and elbow joints are necessary.
- Secure the sides of the cardboard together using strong tape or glue to ensure they hold their shape. If opting for PVC pipe, connect the lengths of the pipe with the elbow joints to make a periscope shape.
Setting Up the Mirrors
The mirrors are a crucial component of your periscope, allowing you to see over and around obstacles. Here’s how to install them:
- Cut a mirror into two equal rectangles small enough to fit into the ends of your periscope’s body.
- Position the mirrors inside the body at 45-degree angles, ensuring they face each other. The top mirror reflects the image down the tube to the bottom mirror, which then reflects it to your eye.
- Use tape or glue to fix the mirrors securely in place, making sure they stay aligned for a clear view.
Michelle Connolly, the founder of LearningMole with considerable experience as an educational consultant, says, “Building a periscope is not just a lesson in physics; it’s a hands-on adventure that challenges young minds to transform simple materials into a working scientific instrument.”
Optimising the View

Achieving the perfect view through your periscope involves carefully adjusting the angles of the mirrors and enhancing what you can see.
Adjusting Mirror Angles
To obtain a clear image, the mirrors in your periscope must be positioned at precisely 45 degrees. This angle ensures that light reflected from one mirror to the other travels directly to your eyes. Proper alignment of the mirrors is crucial as it affects the clarity and the orientation of the view you receive.
Enhancing the Field of View
Using larger mirrors that collect more light can increase the field of view. However, the size of the mirrors is limited by the dimensions of your periscope. To enhance the field of view, position the mirrors to capture the widest angle of light available without distorting the image.
“Seeing more isn’t just about larger mirrors; it’s about smarter positioning. Just a few degrees can make all the difference,” says Michelle Connolly, founder of LearningMole and educational expert with many years in the classroom.
Crafting with Precision
When building your own periscope, precision is key. From cutting materials to assembling parts, each step requires careful attention to detail to ensure the final product works as intended.
Cutting and Measuring Accurately
To start, you’ll need sharp scissors that fit comfortably in your hand. Precision in cutting is vital; even a few millimetres off can affect the periscope’s functionality. Use a ruler to measure twice before any cut to guarantee accuracy. Always cut along a straight edge to maintain clean, straight lines for the best optical performance.
- Checklist for Accurate Cutting:
- Sharp scissors
- Ruler for precise measurements
- Straight edge guide for clean cuts
Securing Components Firmly
Once your pieces are cut to size, securing them together is the next step. Use tape to hold the components in place temporarily. Consider using putty at the joints for a stronger and more durable hold. Ensure all pieces are aligned correctly before securing them—a misalignment can lead to an ineffective periscope.
- Tips for Firm Assembly:
- Always align components before using tape or putty.
- Apply tape evenly to avoid bumps.
- Use putty for a sturdier construction; it should be malleable yet firm.
“Every craft project is a small act of creation, and the perfection in the final piece lies in the precision of every small step,” says Michelle Connolly, Founder of LearningMole and an experienced educational consultant. Her words remind us that patience and careful attention to detail can lead to success in even the simplest projects.
The Role of Periscopes in Different Fields
As you explore the fascinating world of optics, periscopes stand out as versatile instruments that extend our view in situations where direct line-of-sight is impossible. Now, let’s delve into the specifics of how periscopes function in different sectors.
Periscopes in Submarines
Submarines rely extensively on periscopes for navigation and surveillance while submerged. These slender and long tubes offer a vital means to observe the surface without exposing much of the submarine’s body to potential threats. The key component here is the field of view that the periscope provides, allowing the crew to stay aware of their surroundings while remaining hidden beneath the waves.
Broader Uses of Periscopes
Beyond submarines, the application of periscopes is far-reaching. In tanks, they enable soldiers to spot their targets while staying protected inside the armour. Meanwhile, the simple yet clever concept of a rear-view mirror in cars was inspired by periscopic technology, helping drivers to see behind them. Even hairdressers can use wall-mounted periscope-like mirrors to show clients the back of their heads. Each use is innovative in its approach to overcoming visual barriers and expanding the human field of vision.
Michelle Connolly, a founder and educational consultant with over a decade and a half of classroom experience, remarked, “Periscopes are an excellent example of how simple physics can have profound applications across various fields, inspiring curiosity and innovative thinking.”
Recall this ingenuity when you’re peering through a periscope; it’s not just a tool; it’s a gateway to broader perspectives in numerous professions.
Reflection in Everyday Life
In daily life, you’re surrounded by mirrors and reflective surfaces that send light back to your eyes, allowing you to see yourself and the world around you from different perspectives.
Examples of Reflection Around Us
- Mirrors: The most common instance of reflection you encounter is in mirrors, where you see a clear image of yourself due to the smooth surface reflecting light back to your eyes.
- Water: Bodies of water, from a small puddle to a vast lake, often act as natural mirrors, creating beautiful reflections of the sky, trees, and buildings.
Reflection isn’t just a visual treat; it’s essential to how you perceive and interact with the world.
Reflection in Science and Technology
- Science Labs: When studying light, mirrors are often employed in lab settings to illustrate the laws of reflection and to teach about angles and surfaces.
- Technology Applications: Reflection-based technologies are found in periscopes, allowing views around obstacles and in optical instruments like telescopes, aiding in the exploration of the cosmos.
“Understanding light’s behaviour through reflective surfaces offers a gateway to grasping fundamental principles in physics and enhancing technological designs,” shares Michelle Connolly, an expert with over 16 years of classroom experience.
Enhancing Your Periscope

Before you dive into the fun world of periscope creation, consider how you can make your optical device not just functional but also exceptional. Think about features that could improve visibility or make your periscope uniquely yours.
Advanced Modifications
Upgrading your periscope can start with incorporating magnifying lenses to enhance the viewing experience. This change can significantly improve the scale at which you view objects. For instance, a lens with a larger diameter will allow more light and provide a broader view, while a lens with greater magnification power will bring distant objects into closer focus.
| Lens Feature | Impact on Periscope |
|---|---|
| Larger Diameter | Wider field of vision |
| Higher Magnification | Closer view of distant objects |
Moreover, selecting the best materials can boost the periscope’s longevity and performance. For enhanced light reflection, opt for mirrors with a high-quality reflective surface and ensure they’re securely mounted to avoid image distortion.
Creative Ideas for Personalisation
It’s all in the details when it comes to making your periscope truly one-of-a-kind. Personalising its colour and design is enjoyable and allows you to express your creativity. You might consider painting the exterior with vivid patterns or using decorative materials that reflect your personality.
“You can transform a basic periscope into a work of art. It’s not just a tool for exploration; it’s a reflection of the maker’s imagination,” says Michelle Connolly, a veteran educational consultant. Remember to use durable paint or stickers designed for your periscope’s material, ensuring your personalised decorations last as long as your adventures do.
Conducting Experiments with Light
Exploring light through hands-on experiments can illuminate the principles of reflection and add a practical dimension to your understanding of optics. Whether for a school science project or simply to satisfy your own curiosity, experimenting with light is a fun and educational activity to delve into.
Simple Reflection Experiments
To start, you can perform an experiment to explore how light reflects off surfaces. Grab a torch and a small mirror. In a darkened room, shine the torch at the mirror and observe the reflected light on a wall. Adjust the angle of the mirror and note how the angle of incidence is equal to the angle of reflection. This simple activity demonstrates the predictable behaviour of light when it encounters reflective surfaces.
Understanding Light Behaviour
Beyond reflection, light behaves in various fascinating ways that can be explored through further experimentation. For example, you can use a prism to observe how white light splits into a spectrum of colours, revealing the different wavelengths that make up visible light. Another engaging science project could involve the use of a homemade periscope, experiencing firsthand how light enables us to see around corners through a series of reflections.
Michelle Connolly, LearningMole’s founder, shares a key insight into this topic: “Observe light’s behaviour; it’s like a dance where the boundaries of science and art beautifully blur. Engaging young minds in these experiments is at the heart of LearningMole’s mission to make learning both accessible and enjoyable.”
Light experiments are an excellent free resource for learning at home or in the classroom. They promote an active engagement with science, helping you understand the fundamental properties of light and how it interacts with the world around us.
Learning Resources and References
To build your own periscope and explore the principles of light and reflection, it’s helpful to gather reliable resources and references. This section provides books and online materials tailored to support your learning journey.
Books and Educational Material
- Books: Look for books that explain the basic principles of optics and light. Choose titles that offer experiments and projects, like building a periscope, to reinforce your understanding.
- Educational Kits: Purchase kits that come with all the necessary materials and step-by-step guides. These often include mirrors, lenses, and detailed instructions.
Online Guides and Tutorials
- LearningMole’s Guide to Building a Periscope: This comprehensive tutorial breaks down the process into simple steps, making it easy for you to grasp the complexities of light reflection and mirrors.
- YouTube Tutorials: Search for hands-on demonstrations on building a periscope. Make sure they are from credible educators or scientists.
Additionally, as Michelle Connolly, an expert with 16 years of classroom experience, says, “The joy of science is in making discoveries yourself.” Use this advice to fuel your curiosity and delve into practical, hands-on science with your periscope project.
Frequently Asked Questions

Before you embark on your periscope-building adventure, consider these common queries to ensure your success and understanding of the key concepts involved.
What materials are needed to construct a homemade periscope?
You’ll need two mirrors, a cardboard tube, adhesive tape, scissors, and optionally, some decorative materials to personalise your periscope. “Gathering your materials is the first step on this exciting journey of discovery,” suggests Michelle Connolly, an educational expert.
Could you explain the science behind how periscopes work with light and reflection?
Periscopes operate on the principles of reflection. Light bounces off an object and travels to the mirror at the top of the periscope, reflects down to the mirror at the bottom, and then reaches your eye. “It’s remarkable how you can see over obstacles just by understanding the basic science of reflection,” says Michelle Connolly.
What are the steps to creating a simple periscope for educational purposes?
First, cut the tube to your desired size and cut slits for the mirrors. Place the mirrors inside the slits at 45-degree angles to each other. Secure everything with tape. “It’s all about the angles; precision is key for your periscope to function correctly,” Michelle Connolly advises.
Are there templates available for making periscopes with children?
Yes, you can find many templates online specifically designed for children to build periscopes. These templates can make the process simpler and are great for group activities.
How can you create a periscope if you do not have any mirrors?
If mirrors are unavailable, any reflective surface, like a polished metal sheet or a CD, can substitute. However, mirrors provide the best clarity and reflection for a periscope.
In what ways are periscopes utilised in everyday life?
Periscopes are not just for submarines; they can be used in various everyday situations, such as seeing over crowds at events or around corners in tight spaces. Michelle Connolly points out, “Periscopes are a fantastic way to spark curiosity and teach practical science applications.”
<p>The post Build Your Own Periscope: A Fun Guide to Exploring Light and Reflection first appeared on LearningMole.</p>








