Light
When we talk about light we usually mean the light we can see with our eyes. This is also 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!
Measure Mountains on the Moon
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.