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qUESTIONS

The refractive index of a certain glass is 1.5 for light whose wavelength in vacuum is 6000 A. The wavelength of this light when it passes through glass is

A vessel of depth 2d cm is half filled with a liquid of refractive index µ1, and the upper half with a liquid of refractive index μ2. The apparent depth of the vessel seen perpendicularly is

The critical angle for a ray of light from glass to air is “θ” and refractive index of glass w.r.t. air is ‘n’. If a ray of light is incident from air to glass at angle ‘ θ ‘ then corresponding angle of refraction is:

The refractive index of material of glass is √3. If the angle of minimum deviation is equal to angle of prism, the angle of prism is:

A thin prism is first placed in air and then surrounded by water. The ratio of deviations produced by it in two cases is (air and water): (Refractive index = μ =3/2 , μ=4/3

A convex lens of focal length ‘f1’ and concave lens of focal length ‘f2’ are combined to have effective focal length ‘F’. This combination of lenses will behave like a concave lens, it:

An underwater swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be a distance from the surface of water equal to (Refractive Index of water is 4/3)

A monochromatic ray of light travels through glass slab and water column. The number of waves in glass slab of thickness 4 cm is same as in water column of height 5 cm. If refractive index of glass is 5/3 then refractive index of water is

A microscope is focused on a coin lying at the bottom of a beaker. The microscope is now raised up by 1 cm. To what depth should the water be poured into the beaker so that coin is again in focus? (Refractive index of water is 4/3)

A glass slab of thickness 3 cm and refractive index 3/2 of placed on ink mark on a piece of paper. For a person looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be

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