Light
When we talk about light, we usually mean the light that we can see with our eyes.
This type of light is called visible or optical light.
Image
Credit
This work
by Emmanuel Huybrechts
is licensed under Creative Commons Attribution 4.0 International
Investigate Day and Night
On Earth, night follows day and day follows night. But why?
Complete this fun investigation to find out!
Why Do Shadows Change Over Time?
Have you noticed that your shadow changes over time? The cartoon on this page shows why shadows change during the day.