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JEE PHYSICS MCQ: RAY OPTICS

1 Hard

1 of 1

Application +4 | -1

The exposure time of a camera lens at the

\frac{f}{{2.8}}

setting is

\frac{1}{{200}}

second. The correct time of exposure at

\frac{f}{{5.6}}

is

View answer and explanation

Correct option: B

0.02 sec

Option B (0.02 sec) is correct because the exposure time is proportional to the square of the f-number.

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