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An interference pattern was made by using red light. If the red light is replaced by blue light, the fringes will becomes
Options
(a) Wider
(b) Narrower
(c) Fainter
(d) Brighter
Correct Answer:
Narrower
Explanation:
Fringe width β = λD / d
β(ʀed) / β(ʙlue) = λ(ʀed) / λ(ʙlue)
λ(ʙlue) is < λ(ʀed)
Therefore, Fringe width with blue light < β with red light.
Fringes become narrower with blue light.
Related Questions: - In Young’s double slit experiment, for which colour the fringe width is the least
- Two bodies A(of mass 1kg) and B(of mass 3 kg) are dropped from heights of 16m and 25m
- A wire of a certain material is stretched slowly by ten percent. Its new resistance
- A photocell employs photoelectric effect to convert
- A parallel plate air capacitor is charged to a potential difference of V volts.
Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In Young’s double slit experiment, for which colour the fringe width is the least
- Two bodies A(of mass 1kg) and B(of mass 3 kg) are dropped from heights of 16m and 25m
- A wire of a certain material is stretched slowly by ten percent. Its new resistance
- A photocell employs photoelectric effect to convert
- A parallel plate air capacitor is charged to a potential difference of V volts.
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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