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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)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A cell of emf E and internal resistance r supplies current for the same time
- A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth
- A solid sphere, a hollow sphere and a ring are released from top of an inclined
- If in a L-R series circuit the power factor is 1/2 and R=100Ω, then the value of L is,
- A piece of marble is projected from the earth’s surface with velocity of 50 m/s
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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