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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.
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Topics: Wave Optics
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A particle is executing the motion x=Acos (ωt-θ). The maximum velocity of the particle is
- In an L-C-R series resonant circuit, the capacitance is changed from C to 4C.
- An inductor coil is connected to a 12 V battery and drawing a current 24 A. This coil
- A man weighing 60 kg climbs a staircase carrying a 20 kg load on his hand
- A long straight wire carries a certain current and produces a magnetic field
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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