A certain type of film requires an exposure time of 0.010 s with an f/2 lens setting. Another type of film requires twice 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? f/

A certain type of film requires an exposure time of 0.010 s with an f/2 lens setting. Another type of film requires twice 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? f/

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter2: Geometric Optics And Image Formation

Section: Chapter Questions

Problem 103P: A large reflecting telescope has an objective mirror with a 10.0-rn radius of curvature. What...

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A certain type of film requires an exposure time of 0.010 s with an f/2 lens setting. Another type of film requires twice 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?
f/
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