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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: - The damping force on an oscillator is directly proportional to the velocity.
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The damping force on an oscillator is directly proportional to the velocity.
- Two concentric coils each of radius equal to 2π cm are placed at right angles
- A 100Ω resistance and a capacitor of 100Ω reactance are connected in series
- The radius of the first orbit of the hydrogen atom is a₀. The radius of the second orbit
- If L and C denote inductance and capacitance,then the dimensions of L-C are
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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