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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: - An object placed at 20 cm in front of a concave mirror produces three times
- Shear modulus is zero for
- The shortest wavelength in Lyman series is 91.2 nm. The largest wavelength
- A body is placed in an insulating container at temperature 227⁰C.
- What is the time taken by moon light to reach earth?
Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An object placed at 20 cm in front of a concave mirror produces three times
- Shear modulus is zero for
- The shortest wavelength in Lyman series is 91.2 nm. The largest wavelength
- A body is placed in an insulating container at temperature 227⁰C.
- What is the time taken by moon light to reach earth?
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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