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Flashcards in Booklet Deck (9)
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1
Q

What can a lens be used for?

A

To produce a clear image of a distant object on a screen

2
Q

The image produced is real because it is …

A

On a screen

3
Q

Describe how to measure the focal length of the lens

A

Measure the distance between the lens and the screen when the image is sharp and clear

4
Q

Explain what the eyepiece lens does

A

Magnifies the image and refracts the light

5
Q

The light that travels from stars transfers …

A

Energy

6
Q

A scientist is standing a long way from the explosion.

Explain why he hears the explosion a few seconds after he sees it

A

Sound travels faster than light so we see it then hear it

7
Q

The size of the image is what the distant object?

A

Smaller than

8
Q

The type of the image formed on the screen is …. Image

A

Real

9
Q

A satellite orbits the moon.

Radio waves from the satellite transfer what?

A

Energy and information