Explain why The angle of contact of mercury with glass is obtuse, while that of water with glass is acute.

Explain why: Solar cookers are covered with glass plate.

What is the shape of meniscus of mercury in contact with glass?

A combination of two prisms,one of flint and other of crown glass produces dispersion without deviation.The angle off teh flint glass prism is 15^@ .Calculate teh angle of crown glass prism and the angular separation of the red and violet rays on emregence from the spectroscope .( mu for crown glass = 1.52, mu for flint glass=1.65 , omega for crown glass 0.02 , omega for flint glass =0.03).

The surface of the water in contact with the glass wall is

(a) and (b) show refraction of a ray in incident at 60^@ with the normal to a glass-air interface respectively.Predict the angle of refraction in glass when the angle of incidence in water is 45^@ with the normal to a water-glass interface[Fig.6.01(c)]. .

Figures (a) and (b) show refraction of a ray in air incident at 60^@ with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in glass when the angle of incidence in water is 45^@ with the normal to a water-glass interface [Fig. (c)]. :