Question

How does a Fresnel rhomb work (half and quarter wave plate)?

Answer 1

I am aware of birefringence, which creates a phase shift of Δϕ=2πΔnLλ0. But this doesn't explain how a plane polarised light shifts it's polarization angle after a half-waveplate or how a linearly polarised light becomes elliptical after a quarter-waveplate.

Answer 2

heya....

Here is your answer...

I am aware of birefringence, which creates a phase shift of Δϕ=2πΔnLλ0Δϕ=2πΔnLλ0. But this doesn't explain how a plane polarised light shifts it's polarization angle after a half-waveplate or how a linearly polarised light becomes elliptical after a quarter-waveplate.

It may help you ...☺☺