a) What does the acronym LASER stand for? b) What is a laser?

A black body radiates maximum energy when its surface temperature T and the corresponding wavelength \(\lambda\)max are related by the equation \(\lambda\)ma...

(a) Define strain. (b) A rubber band is stretched to twice its original length. Calculate the strain on the rubber band.

(a) What is an intrinsic semiconductor? (b) Distinguish between the p-type and n-type semi-conductors.

State three materials used for making optical fibres.

Name three classes of magnetic materials.

(a) List two factors each that affect heat loss by: (i) radiation; (ii) convection. (b) State two factors that determine the quantity of heat in a body. (c) ...

A missile is projected so as to attain its maximum range. Calculate the maximum height attained if the initial velocity of projection is 200 ms\(^{-1}\). [g ...

(a) Define uniform acceleration. (b) Forces act on a car in motion. List the (i) horizontal forces and their directions; (ii) vertical forces and their direc...