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As a result of interference of two coherent sources of light, energy is
Options
(a) Increased
(b) Redistributed and the distribution does not vary with time
(c) Decreased
(d) Redistributed and the distribution changes with time
Correct Answer:
Redistributed and the distribution does not vary with time
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
- Three identical spheres, each of mass 3 kg are placed touching each other
- A 220 volts input is supplied to a transformer. The output circuit draws
- A body travels 200 cm in the first two seconds and 220 cm in the next 4 secs
- What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
- For photoelectric emission from certain metal the cut-off frequency is v
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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The coherent sources are those which have the same frequency and same phase difference. Interference from these sources produce dark and bright fringes patterns. But we can’t see them because they occur randomly.
Laser light has the same frequency and same phase difference, so this is an example of a coherent source and the electrical signal of sound waves goes with constant phase difference and constant frequency.
Constructive interference occurs when waves have constant displacement and are in constant phase. Their amplitude is maximum.
Destructive interference occurs when waves don’t have constant phase difference and displacement. Their amplitude is minimum.
When the interference occurs, it yields patterns that contain both maxima and minima. This tells us that emitted energy from two coherent sources of light are redistributed in the fringe pattern and this distribution is independent of time but depends upon space.
Therefore, option (A) is correct.