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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: - Electron in hydrogen atom first jumps from third excited state to second excited
- A galvanometer is converted into an ammeter by connecting
- Four blocks of same mass connected by cords are pulled by a force F
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Electron in hydrogen atom first jumps from third excited state to second excited
- A galvanometer is converted into an ammeter by connecting
- Four blocks of same mass connected by cords are pulled by a force F
- Two strings A and B, made of same material are stretched by same tension
- An ac voltage is applied to a resistance R and an inductor L in series
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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