Author Question: A clown 2 m tall looks at himself in a full-length mirror (floor-to-ceiling). Where in the mirror ... (Read 96 times)

sdfghj · **on:** Aug 10, 2020

Question 1

A camera has a converging lens with a focal length of 56 mm. If the f-number is 2.8, what is the diameter of the lens (in mm)?

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10

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31

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0.50

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20

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50

Question 2

A clown 2 m tall looks at himself in a full-length mirror (floor-to-ceiling). Where in the mirror must he look to see his feet?

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1 m from the floor

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50 cm from the floor

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25 cm from the floor

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at the bottom of the mirror

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1.5 m from the floor

janeli1 · **Reply #1 on:** Aug 10, 2020

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