REFRACTION-2

Refraction Numerical Part 2

Assertion : A convex lens made of material of refractive index 1.2 behaves as diverging lens when kept in water of refractive index 4//3 . Reason : A convex lens made of material of refractive index 1.2 behaves as converging lens when placed in air.

AB and CD are surfaces ot two slabs as shown in Figure . The medium between the slabs has refractive indes 2. Refractive indes of the slab above Ab is sqrt(2) and below CD is sqrt(3) . Find the minimum angle of incidence at Q, so that the ray is totally reflected by both the slabs.

Statement-1 : The refractive index of a prism depends only on the kind of glass of which this is made and the colour of light. Statement-2 : The refractive index of a prism depens upon refracting angle of prism and angle of minimum deviation.

The wavelength of green light in air is 5400 A.U. Its wavelength in the glass of refractive index 3/2 is

Statement-1 : A ray of light incident normally on a refracting surface does not suffer any refraction. Statement-2 : The critical angle for total internal refraction is smaller when a ray of light travels from glass to water than when it travels from glass to air.

A certain prism of refracting angle 60^(@) and of refractive index 2 is immersed in a liquid of refractive index sqrt(2) . Then the angle of minimum deviation will be