Question

Draw the path of light ray passing through a prism and label the angle of incident and angle of deviation

In the following diagram, the path of a ray of light passing through the glass prism is shown. In this figure the angle of incidence, the angle of emergence and the angle of deviation are-:

A plano-convex lens of focal length 16 cm is made of a material of refractive index 1.4. Calculate the radius of the curved surface of the lens.

A lens is a transparent medium bounded by two surfaces, with one or both surfaces being spherical. The focal length of a lens is determined by the radii of curvature of its two surfaces and the refractive index of its medium with respect to that of the surrounding medium. The power of a lens is reciprocal of its focal length. If a number of lenses are kept in contact, the power of the combination is the algebraic sum of the powers of the individual lenses.