Question: Suppose that a correct exposure is 1/250 s at f /11. Under the same conditions, what exposure time would be needed for a pinhole camera

Suppose that a correct exposure is 1/250 s at f /11. Under the same conditions, what exposure time would be needed for a pinhole camera (problem 8) if the pinhole diameter is 1.0 mm and the film is 7.0 cm from the hole?

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