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PHYSICS

JAMB 2015 - Question 36

Physics 2015 JAMB Past Questions - Question 36: A thin converging lens has a power of 4.0 diopters. Determine its focal length

Choose the correct answers from the options given.

A thin converging lens has a power of 4.0 diopters. Determine its focal length

A: 0.25 m

B: 0.03 m.

C: 5.00 m.

D: 2.50 m.

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Correct Answer

Explanation

To determine the focal length of a lens, we can use the formula:

focal length (in meters) = 1 / power (in diopters)

Given that the power of the lens is 4.0 diopters, we can substitute this value into the formula:

focal length = 1 / 4.0

Calculating this, we find:

focal length = 0.25 meters

Therefore, the focal length of the thin converging lens is 0.25 meters.