Some light from a lamp reaches your eye after hitting a closed paper book. What did that portion of light do at the book?

• It passed through the book toward your eye
• It reflected off the book toward your eye
• It was absorbed by the book instead of leaving

Which best describes how you see an ordinary ball lying on sunlit grass?

• Light bounces off the ball and enters your eyes
• Light leaves your eyes and travels onto the ball
• Light is made inside the ball and enters your eyes

Your eyes make a beam that lights objects so you can see them.

A room contains no light at all. Why can you not see ordinary shoes on its floor, even after waiting?

• There is no light to reflect off the shoes into your eyes
• Your eyes will make their own light after a few minutes
• The shoes stop reflecting forever when the room becomes dark

A lamp is the only light reaching a wooden toy. An opaque card blocks all lamp light before it reaches the toy. Why can you no longer see the toy?

• The toy now makes light that travels away from your eyes
• The card sends extra lamp light through itself to the toy
• The toy has no incoming light to reflect into your eyes

A glowing lamp must reflect light from another lamp before you can see it.

Sunlight enters a cave and hits a rock. Some reflected light may reach other surfaces. What must happen for you to see any non-glowing surface there?

• Your body must make the light that reaches that surface
• Your eyes must send a beam that illuminates that surface
• Light must reach the surface and reflect into your eyes

Zara says an ordinary apple must make light because she can see it in a lit room. What corrects her idea?

• The apple makes blue light whenever a lamp shines on it
• The apple reflects light; it does not make its own light.
• No apple can be visible under light from an ordinary lamp