you still get all the other light unless you have some kind of filter. There are different ways of doing this, so [Peter] decided to do them all with an adjustable wheel to flip through all the ...

A little boy, Anshu, wonders what happens when his Dad switches his bedroom light off at night. Anshu explores his bedroom as his eyes become accustomed to the dark, noticing the different light ...

How do different light sources affect the size and shape- of shadows? Quintin Question wonders how shadows can be all different shapes and sizes. How are sounds made? Sounds are made when objects ...