A point source is kept at a distnace 1000m has an illumination I. To change the illumination

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A point source is kept at a distnace 1000m has an illumination I. To change the illumination to 16I, the new distance should become

Options

(a) 250 m
(b) 500 m
(c) 750 m
(d) 800 m

Correct Answer:

250 m

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

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Topics: Wave Optics (101)
Subject: Physics (2479)

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