Wave Optics — JEE Main PYQs

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye? [Take wavelength of light $=500$ nm]

When an unpolarized light of intensity $I_0$ is incident on a polarizing sheet, the intensity of the light which does not get transmitted is

If ${\mathrm{I}}_0$ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled?

The angle of incidence at which reflected light totally polarized for reflection from air to glass (refractive index $n$), is

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young's double-slit experiment is