introduction of solid state physics

Lasers-An Introduction - The laser is an acronym for Light Amplification by Stimulated Emission of Radiation. The laser has been invented and developed in 1959 and 1960. In the laser, the maser principle has been extended to optical or visible light frequencies of 10 1 4 to 10 1 5 cycle/s..

The cells discussed above use a liquid electrolyte, one cathode and an anode. Some of the major disadvantages of these cells are leakage on long term storage, corrosion due to the use of liquid acidic/alkaline solution, short life, low weightage per kg mass of the cell and limit on miniaturization...

Oscillatory motion, or periodic motion, is the most common type of motion. Heartbeat of animals, the seasons of the year, the swinging of the pendulum of a clock and the vibrations of atoms in solids are periodic in natur..

We have learnt that a force changes or tends to change the state of rest, speed or direction of motion of an object, i.e., the force produces an acceleration. In this chapter, we are going to identify one of the forces which produces acceleration in all objects on the surface of the..

A spider web is stronger than steel of the same thickness. Its elastic limit is greater than that of steel. A force is a push or pull exerted by one object or body on another. It may cause a body at rest to move or one in motion, to change its speed or direction. It may also change the shape or..

When two solid surfaces slide over each other, a frictional force acts between them that opposes the relative motion of the bodies. Similarly, when a layer of a liquid slips on another layer the two exert a tangential force on another. This opposes their motion. The property of a li..

When a thermometer is dropped accidentally, we find the mercury inside the bulb of the thermometer rolling down as small perfect spheres. Raindrops and soap bubbles are also perfectly spherical in shape. A plastic strainer floats on water which is unusua..

Heat is a form of energy. Heat energy is also called thermal energy. When heat is given to a body, its temperature increases and when heat is removed from a body, its temperature decreases. Heat is a measurable quantity. The measurement of the quantity of heat is called calorimetry. Every substance..

The States of Matter - Matter occurs in four states: Solid, Liquid, Gas and Plas..

The molecules in a solid are very closely packed. The inter-molecular force of attraction is very strong in solids. Hence solids have a definite size and shape. Molecules of a solid vibrate about their mean positio..