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A) Camera A has a lens with an aperture diameter of 8.50 mm . It photographs...

A) Camera A has a lens with an aperture diameter of 8.50 mm . It photographs an object, using the correct exposure time of 1/34s.

What exposure time should be used with camera B in photographing the same object with the same film if camera B has a lens with an aperture diameter of 23.6 mm ?

2) A student’s far point is at 19.0 cm , and she needs glasses to view her computer screen comfortably at a distance of 52.0 cm .

What should be the power of the lenses for her glasses? Answer should be in diopters .

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