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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Three cells, each of e.m.f 1.5 V and internal resistance 1 ohm are connected in parallel
- The temperature of ideal gas is reduced from 927° C to 27° C. The r.m.s velocity
- A particle of mass m, charge Q and kinetic enery T enters a transverse
- A ray of light travelling in a transparent medium of refractive index µ, falls on surface
- A bullet is shot from a riffle. As a result the rifle recoils.The kinetic energy of riffle
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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