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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: - A body of mass 120 kg and density 600 kg/m³ floats in water.
- The ratio of magnetic dipole moment of an electron of charge e and mass m
- Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths
- In thermodynamics processes which of the following statements is not true?
- If the image formed by a convex mirror of focal length 30 cm is a quarter of the size
Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A body of mass 120 kg and density 600 kg/m³ floats in water.
- The ratio of magnetic dipole moment of an electron of charge e and mass m
- Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths
- In thermodynamics processes which of the following statements is not true?
- If the image formed by a convex mirror of focal length 30 cm is a quarter of the size
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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