Explain how shadows form.
Describe how light allows us to see objects around us.
What is a luminous object? Give two examples.
Why is the Moon visible to us, even though it is not a light source?
Describe what happens to light when it travels through a transparent material.
How does a mirror change the direction of light?
Why does light travel faster through air than through water?
Explain how a camera uses light to form an image.
Why does a shadow sometimes appear bigger or smaller?
Describe what happens when light hits a shiny, smooth surface.