Interference pattern can be observed due to superposition of the following waves:

A. $$y=a \sin \omega t$$

B. $$y=a \sin 2 \omega t$$

C. $$y=a \sin (\omega t-\phi)$$

D. $$y=a \sin 3 \omega t$$

Choose the correct answer from the options given below.

A beam of unpolarized light of intensity I0 is passed through a polaroid A, then through another polaroid B, oriented at $$60^\circ$$ and finally through another polaroid C, oriented at 45$$^\circ$$ relative to B as shown. The intensity of emergent light is:

If the monochromatic source in Young's double slit experiment is replaced by white light, then

An unpolarised light beam strikes a glass surface at Brewster's angle. Then