Make a Shadow Play Theater
Take the quiz and check your answers!
Click here to take the quiz!The World Reflected in Mirrors
. This principle is used to write ‘119’ on the front of the ambulance in ② so that drivers of vehicles ahead can easily read it in their rearview mirrors.
How are mirrors made? During the Gojoseon period, bronze mirrors were made by polishing the metal surface until it was smooth, allowing light to reflect and objects to be seen. Mass production of mirrors became possible in 1835 when a German chemist invented a mirror by coating the surface of glass with a thin layer of silver.Until then, the process of making mirrors was extremely complex, so only the upper class could afford them. However, with this new manufacturing method, mirrors became affordable for the general public. Today, even cheaper mirrors can be made using materials like aluminum instead of silver.
Mirrors can make objects appear differently depending on their shape. For example, in a funhouse mirror at an amusement park, you may look taller, shorter, wider, or thinner.
The letters written on the ambulance
which has a curved outward surface, makes objects appear smaller while providing a wider field of view, making it ideal for security mirrors, safety mirrors at curves, and side mirrors on vehicles. A ④
has a surface that curves inward, has the property of converging light. Because of this, it is commonly used in flashlights, car headlights, and Olympic torches, which use sunlight to ignite the flame.
Convex Mirror – Side Mirror
Convex Mirror – Security Mirror
Concave Mirror – Olympic Torch Reflector
Concave Mirror – Flashlight
Click here to take the quiz!Observing Kaleidoscopes
Observing Reflections in Two Mirrors
As shown in the image, place an object between two mirrors and count how many times it is reflected.
Infer Like a Scientist
As the angle between the two mirrors decreases, do you see more reflections or fewer reflections?Observing Patterns in a Kaleidoscope
The kaleidoscope was invented in 1817 by David Brewster, a physicist from Scotland. It consists of three identical flat mirrors arranged in a triangular prism. Inside, there are colorful pieces of paper or beads. One end is covered with frosted glass while the other end remains open for viewing. As light reflects multiple times inside the mirrors, it creates various beautiful patterns. Try to match the objects inside the kaleidoscope with the patterns they form in the mirrors.
kaleidoscope
Patterns seen in the mirrors
Patterns seen in the mirrors
Click here to take the quiz!The Principles of Shadow Animation
Activity 1
Please follow the instructions and assemble the educational kit in the order specified.
Activity 2: Observing shadow size
How does the distance between the stage, puppet, and light source affect the size of the shadow in the shadow animation? Adjust the puppet’s position and the light source to observe and describe how the shadow size changes.
Observing shadow size
| Position of the shadow puppet | Size of the shadow |
|---|---|
| The shadow puppet is closer to the light source than the stage. | ⑫ |
| The shadow puppet is closer to the stage than the light source. | ⑬ |
Activity 3: Creating colored stages and shadows
When creating shadow animation, the stage color or shadow color can be changed to match different atmospheres. Match the methods below to create colorful stages and shadows.
Ⓐ Create an orange-colored background
Ⓑ Make colorful shadows.