Which of these is NOT a source of light?

What type of objects allow some light to pass through but not all?

Why do we see a shadow?

Which of the following is an example of a transparent material?

When is your shadow the shortest?

Which of these objects would create the sharpest shadow?

What happens when light hits a mirror?

What do you call the straight line path that light travels in?

Why can’t we see in the dark?

Which type of shadow is formed when the light source is very close to the object?