In the far field diffraction pattern of a single slit under polychromatic illumination, the first minima with the wavelength λ1 is found to be coincident with the third maximum at λ2. So :

A single slit of width a is illuminated by violet light of wavelength 400 nm and the width of the diffraction pattern is measured as y. When half of the slit width is covered and illuminated by yellow light of wavelength 600 nm, the width of the diffraction pattern is :

Two polaroids are placed in the path of unpolarized beam of intensity I0 such that no light is emitted from the second polaroid. If a third polaroid whose polarization axis makes an angle θ with the polarization axis of first polaroid, is placed between these polaroids then the intensity of light emerging from the last polaroid will be :

A light has amplitude A and angle between analyser and polariser is 60 degree. Light is transmitted by analyser has amplitude.

Two Nicols are oriented with their principal planes making an angle of 60°. The percentage of incident unpolarized light which passes through the system is :

The graph showing the dependence of intensity of transmitted light on the angle between polariser and analyser, is :