Waves

• A wave is an oscillation accompanied by a transfer of energy that travels through a medium or space. 
• Wave transfer energy from one point to the other point.

There are two types of waves:

1.Mechanical waves: A wave which propagate through medium and the substance of the medium get disturbed is called mechanical wave.

2.Electromagnetic wave: A wave which does not require any medium and propagate through vacuum is called electromagnetic wave.

• A electromagnetic wave is generated by charged particles hence it can propagate through vacuum.
• Radio waves, light waves, infrared, ultraviolet, X-rays, Gamma rays are electromagnet waves.
• They consists of both electric and magnetic fields.

Longitudinal wave:

• A longitudinal wave consists of compression and rarefraction.
• It is a mechanical wave.

Transverse wave:

• A transverse wave consists of crests and troughs.
• It is continuous.
• Amplitude (meters), wavelength (meters) (or) cycle and frequency are the measurable quantities of a wave.

• Frequency is number of cycles per second. It is measured in Hertz.

Wave equation:

Wave-forms:

Uses:

• Light travels in the form of waves.
• Waves are used in telecommunications, electronics, power transmissions etc.,

Notes: