From where you stand one night, you see the moon directly over a nearby streetla

Question

From where you stand one night, you see the moon directly over a nearby streetlamp. You use a converging lens to get the moon's image sharply focused on a card: when you do so, the image of the lamp is a little out of focus. To bring the lamp's image into sharp focus, do you need to move the card closer to the lens or farther from the lens? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. The moon is so far away we can consider the rays to be parallel, so they come to focus at the distance of the from the lens, that means the card with the moon's image focused on it is this far from the lens. The lamp is closer, so its rays are as they leave the lamp: consequently, they come to focus the lens than the moon's rays do. The card must be moved the lens to bring the lamp into focus.

Explanation / Answer

Possible values for blanks:

1) Focal length

2) Diverging

3) Farther from

4) Closer to

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