The critical angle for light traveling from a transparent medium to air s measured as 34º. The refractive index of the medium is

 Explain the rise of water in a glass capillary tube using the kinetic theory.

(a) What is diffusion?

(b) State two factors which affect the rate of diffusion.

(a) Explain elasticity of a substance.

(b) Define elastic constant.

A wire is gradually stretched until it snaps. Sketch a load-extension graph for the wire and on the graph indicate the

(a) elastic limit;

(b) yield point;

(c) maximum load;

(d) breaking point.