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A certain type of film requires an exposure time of 0.010 s with an f / 14lens s

ID: 1374753 • Letter: A

Question

A certain type of film requires an exposure time of 0.010 s with an f / 14lens setting. Another type of film requires quadruple the light energy to produce the same level of exposure. What f-number does the second type of film need with the 0.010-s exposure time? (Note: your answer should be a whole number.) A certain type of film requires an exposure time of 0.010 s with an f / 14lens setting. Another type of film requires quadruple the light energy to produce the same level of exposure. What f-number does the second type of film need with the 0.010-s exposure time? (Note: your answer should be a whole number.)

Explanation / Answer

A certain type of film requires an exposure time of 0.010 s with an f / 14lens s

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