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}

Air has a refractive index 1.0003. The thickness of air column, which will have one more wavelength of yellow light (6000 Å) than in the same thickness in vacuum 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

Which of the following phenomenon is not common to sound and light waves?

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

The resolution limit of the eye is 1. At a distance of x km from the eye, two persons stand with a lateral separation of 3 metres. For the two persons to be just resolved by the naked eye, x should be

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

A beam of ordinary unpolarised light passes through a tourmaline crystal C₁ and then it passes through another tourmaline crystal C₂ which is oriented such that its principle plane is parallel to that of C₂. The intensity of emergent light is I₀. Now, C₂ is rotated by 60^o about the ray. The emergent ray will have an intensity

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

Diamond has maximum refractive index, hence, velocity of light in diamond is the least. The refractive index of water is the least, hence, in water the velocity of light is maximum.