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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
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In cyclotron, for a given magnet, radius of the semicircle traced by positive ion
- An alternating voltage e=200s in100t is applied to a series combination
- Which of the following is suitable for the fusion process?
- Three resistances 2Ω, 3Ω and 4Ω are connected in parallel. The ratio of currents passing
- A projectile is fired at 30°. Neglecting friction, the change in kinetic energy when
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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