A beam of width t incident at `45^@` on an air-water boundary. The width of the beam is water is `________`

A beam of width t incident at 45^@ on an air-water boundary. The width of the beam in water is ________

A beam of light incident on a plane mirror forms a real image on reflection. The incident beam is

A beam of light is incident on a water surface of angle of incidence 60^(@) and R.I. of water is 4/3. The ratio of width of incident wavefront to refracted wavefront is

An parallel beam of monochromatic light is incident on a glass slab at an angle of incidence 60^@ . Find the ratio of the width of the beam in glass to that in air, if the refractive index of glass is 1.5.

A ray of light is incident on a medium of refractive index sqrt(2) at an angle of incidence of 45^(@) . The ratio of the width of the incident beam in air to that of the refracted beam in the medium is

A beam o monochromatic light of wavelength lambda is reflected from air into water to refractive index 4/3. The wavelength of light beam inside water will be

There is layer of medium of variable refractive index mu = sqrt(2) - (1)/(sqrt(2)) y (where 0 le t lt 1//2 ) sandwitched between the layer of glass and air A beam of light travelling in air at an angle 45^(@) has a width Delta omega . When the beam enters the layer of glass its width becomes : (mu_("glass") = sqrt(2))