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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 battery having e.m.f. 4 volt and internal resistance 0.5 Ω is connected
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- If a star converts all helium in its core to oxygen, then energy released per oxygen
- A parallel plate capacitor has 91 plates, all are identical and arranged with same
- Angular momentum of the particle rotating with a central force is constant due to
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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