Explain the origin of the phase difference between ordinary and extraordinary beam in a λ/4 plate. how thick should a caco3 crystal be if you want to use it as a λ/4 plate for 400 nm light? what should be the orientation of the linear polarized light to obtain circular polarization (rather than elliptical polarization), relative to the optical axis of caco3?

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these