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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Physics (PH)
To verify that the light beam is either unpolarized or circularly polarızed one requires to use (a) a half wave plate and a polarizer (b) a quarter wave plate (
To verify that the light beam is either unpolarized or circularly polarızed one requires to use (A) a half wave plate and a polarizer (B) a quarter wave plate (C) a quarter wave plate and half wave plate (D) a quarter wave plate and a polarizer
3 Answer(s)
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Somnath Best Answer
When a circularly polarized wave passes through a quarter wave plate it becomes linearly polarized and if a polarizer is kept with its axis perpendicular to polarization it will block the light and we will not get any intensity. But when unpolarized light passes through a quarter wave plate it remains same and when it passes through the second polarizer it will linearly polarized and we wii get some intensity. So the correct answer is D. To verify whether a light is circularly polarized or unpolarized we need a quarterwave plate along with a polarizer.
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Abhishek singh
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a quarter wave plate and a polarizer. because half wave plate will convert the circularly polarized into plane polarized but it doesn't do anything with unpolarized light. now you can easily check by using polarizer.
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Ruby negi![best-answer]()
quarter wave plate, bcz on passing circularly polarised light through quarter wave , it changes to linearly polarised light but unpolarised light remain same on passing through it.