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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
- Two bodies of mass 0.25 kg each moving towards each other with velocity
- An inclined plane of length 5.60m making an angle of 45⁰ with the horizontal is placed
- A DC ammeter has resistance 0.1Ω and its current ranges 0-100A. If the range
- A transformer rated at 10 kW is used to connect a 5 kV transmission line to a 240 V
- A projectile is fired at 30°. Neglecting friction, the change in kinetic energy when
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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