Ishika Saha − Profile

it is the difference between the mass of nucleons and nucleus.

kind of a diffraction pattern. Formed by plane wavefront. Source and plane at infinite distance apart. Source is placed at the focus of a lens.

unpolarized- elecctric field vector in all directions.

polarized - only in one direction perpendicular to the direction of propagation

Fringes of different colours and widths are formed on both sides of the principal maxima.

Fringe width INCREASE.

x = (wavelength * D) / d

so id d decreases,  x increase.

The voltage between the cathode and filament determines the wavelength.