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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 long straight wire carries a certain current and produces a magnetic field
- In a water fall, the water falls from a height of 100 m. If the entire kinetic energy
- Two 220V – 100W bulbs are connected first in series and then in parallel.
- A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy
- Length of a string tied to two rigid supports is 40 cm. Maximum length
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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