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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 body initially at rest is moving with uniform acceleration a m/s²
- The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV,
- A circular disc X of radius R is made from an iron plate of thickness t and another disc
- A particle is released from rest from a tower of height h, i.e,t₁ : t₂ : t₃ is
- A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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