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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 mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
- Cohesive force is experienced between
- One solid sphere A and another hollow sphere B are of same mass and same outer radii.
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
- Cohesive force is experienced between
- One solid sphere A and another hollow sphere B are of same mass and same outer radii.
- An inductor 20 mH, a capacitor 50 μF and a resistor 40Ω are connected in series
- Work done by an external agent in separating the parallel plate capacitor is
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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