In Young's double slit experiment using red and blue lights of wavelengths 600 nm and 480 nm respectively, the value of n for which the nth red fringe coincides with (n + 1)th blue fringe is

A thin transparent sheet is introduced in front of a Young's double slit experiment. The fringe width will

Two sodium lamps are used in an interference experiment. The intensity produced by both lamps individually on the screen is I. The ratio of intensity of maxima to intensity of minima on the screen is

The Young's double slit experiment is performed with blue and with green light of wavelengths 4360 Å and 5460 Å respectively. If x is the distance of the 4th maxima from the central one, then

A slit of width a is illuminated by white light. The first minimum for red light will fall at 30^o, when a is

Two coherent light sources S₁ and S₂ (λ = 6000 Å) are 1 mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be

λ_a and λ_m are the wavelengths of a beam of light in air and in a medium respectively. If θ is the polarising angle, the correct relation between λ_a , λ_{m and θ is}

In a certain double slit experimental arrangement, interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another of wavelength 6000 Å, the fringe width will be

In Young's double slit experiment, the seventh maximum with wavelength λ₁ is at a distance d₁ and the same maximum with wavelength λ₂ is a distance d₂. Then d₁/d₂

In Young's double slit experiment using identical slits, the intensity at a bright fringe is I₀. If one of the slits is now convered, intensity at any point on the screen will be :