Light Waves Interference and Thomas Young Experiment

Question based on Interference and Young's Double Slit Experiment (YDSE)

(a) If one of two identical slits producing interference in Young's experiment is covered with glass so that the light intensity passing through it is reduced to 50%, find the ratio of the maximu and minimum intensity of the fringe in the interference pattern. (b) What kind of fringes do you expect to observe if white light is used instead of monochromatic light ?

The phase difference between light waves from two slits of Young's experiment is pi radian. Will the central fringe be bright or dark ?

Assertion (A): For best contrast between maxima and minima in the interference pattern of Young's double slit experiment, the amplitudes of light waves emerging from the two sources should be equal. Reason (R): For interference, the sources must be coherent.

Assertion (A) : For best contrast between maxima and minima in the interference patten of Young's double slit experiment the intensity of light emerging out of the two slits should be equal. Reasson (R ) : The intensity of interference pattern is proportional to the square of the amplitude.

Light waves producing interference have their amplitudes in the ratio 3:2 . The intensity ratio of maximum and minimum interference fringes is