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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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- The temperature of a metal block is increased from 27⁰C to 84⁰C. The rate of radiated energy
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A proton and an alpha particle both enter a region of uniform magnetic field B,
- The temperature of a metal block is increased from 27⁰C to 84⁰C. The rate of radiated energy
- Coherent sources are those sources for which
- Two identical long conducting wires AOB and COD are placed at right angle
- An engine has an efficiency of 1/6. When the temperature of sink is reduced
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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