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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
- A boy standing at the top of a tower of 20m height drops a stone
- A projectile is fired at 30°. Neglecting friction, the change in kinetic energy when
- A satellite in a circular orbit of radius R has a period of 4 hours. Another satellite
- A body revolved around the sun 27 times faster than the earth. What is the ratio
- A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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