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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
- On heating a ferromagnetic substance above curie temperature
- A dust packet is dropped from 5th storey of a multi-storeyed building
- A body is thrown with a velocity of 9.8 m/s making angle of 30° with the horizontal
- A plumb line is suspended form a ceiling of a car moving with horizontal acceleration
- Which of the following physical quantities has neither dimensions nor unit
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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