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A certain type of film requires an exposure time of 0.011 s with an f/11 lens setting. Another type of film requires twice the light energy to produce the same level of exposure. What f- stop does the second type of film need with the 0.011 s exposure time? (Com- mon f- stops are 1, 1.2, 1.4, 1.8, 2, 4, 8, 11)

A certain type of film requires an exposure time of 0.011 s with an f/11 lens setting. Another type of film requires twice the light energy to produce the same level of exposure. What f- stop does the second type of film need with the 0.011 s exposure time? (Com- mon f- stops are 1, 1.2, 1.4, 1.8, 2, 4, 8, 11)

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I tried it but it’s not 7.7 or 7.8
A certain type of film requires an exposure time of 0.011 s with an f/11 lens setting. Another type of film requires twice the light energy to produce the same level of exposure. What f- stop does the second type of film need with the 0.011 s exposure time? (Com- mon f- stops are 1, 1.2, 1.4, 1.8, 2, 4, 8, 11)
Transcribed Image Text:A certain type of film requires an exposure time of 0.011 s with an f/11 lens setting. Another type of film requires twice the light energy to produce the same level of exposure. What f- stop does the second type of film need with the 0.011 s exposure time? (Com- mon f- stops are 1, 1.2, 1.4, 1.8, 2, 4, 8, 11)
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