In Young's double slit experiment, fringe width is:

Huygen's principle states that each point on a wavefront acts as:

In single slit diffraction, the angular width of central maximum is:

Brewster's angle for glass of refractive index √3 is:

In YDSE, if one slit is covered, the result is:

Polarization proves that light is:

Constructive interference occurs when path difference is:

The resolving power of a telescope increases with:

In YDSE, the intensity at a point where path difference is λ/2 is:

Diffraction of light is observed because:

In YDSE with white light, the central fringe is:

Malus's law states that I = I₀cos²θ, where θ is the angle between:

In YDSE, if the wavelength is doubled, fringe width:

Interference pattern is not observed with two independent sources because:

In diffraction grating, the condition for maximum is:

The wavefront of a point source at large distance is:

In YDSE, the number of maxima between two minima is:

Fresnel distance is the distance at which:

The phenomenon of bending of light around obstacles is called:

Two coherent sources of intensity I₀ produce maximum intensity: