Why Do Shadows Happen?

What Crafty Clover says in this video

Intro

Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do shadows happen?

The Big Idea

A shadow is just a place the light could not reach! Light travels in straight lines. When an object blocks those lines, the space behind it stays dark. That dark patch is a shadow!

Light Shines

Step one: light shines. A lamp or the Sun sends out rays of light. Those rays travel in straight lines, and light up everything they reach.

An Object Blocks Light

Step two: an object blocks the light. Put your hand in the way. Your hand is opaque, which means light can't pass through it. So your hand stops some of the rays.

A Dark Patch Forms

Step three: a dark patch forms. Behind the object, no light arrives. That dark patch is the shadow! Move the object closer to the lamp, and the shadow grows. Move the lamp, and the shadow slides.

A Closer Look

Let's take a closer look at shadows! Rays of light travel in straight lines. The object blocks some of the rays. The darkest part of a shadow is called the umbra. And the shadow lands on the wall behind.

Quick Facts

Quick facts! A small, bright lamp makes a sharp shadow. A big window makes a softer, fuzzy shadow, because light sneaks in from many angles. Night is Earth's own giant shadow! Clear glass makes almost no shadow. Paper makes a weak one.

Think Like a Scientist

Now, think like a scientist! Make a shadow with a flashlight and a toy. Move the toy closer to the wall. What happens to the size of the shadow? Then try moving the light. Write down what you see!

Outro

Light goes straight, and shadows show where it can't. Shadows are science! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!