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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.
Related Questions: - A spherical drop of capacitance 1μF is broken into eight drops of equal radius.
- A magnifying glass of focal length 5 cm is used to view an object by a person
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¹H+⁷Li→⁴He+⁴He
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A spherical drop of capacitance 1μF is broken into eight drops of equal radius.
- A magnifying glass of focal length 5 cm is used to view an object by a person
- What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
- Nuclear fission is not found in
- The half-life of radioactive element is 600 yr. The fraction of sample
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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