properties and uses of different Radiations

Gamma rays

source

properties

they are obtained in radioactive emissions

they cause fluroscence when they strike fluroscent material such as zinc sulphide ,they can easily pentrate through thick metallic sheets

X - Rays

uses

properties

they are used in detection of fracture in bones teeth etc.

they strongly affect a photogrphic plate ,they can pentrate through human flesh but stopped by bones

UV radiations

properties

uses

  1. for sterilising air,surgical equipment
  1. these radiations travel in straight line with a speed of 3 x 10 to the power 8 m s -1 in air and vaccum

visible light

sources

uses

the sun,electric bulb and flame

the visible light is used in photography

infrared radiations

properties

uses

they do not affect the ordinary photographic flim

infrared radiations are used for therpeutic purposes by doctors

microwaves

source

uses

these waves are produced by electronic devices such as crystal oscillators

they are used in satellite communication ,for cooking in microwave and ovens

Radio waves

uses

uses

they are used in industry to check welding

  1. they are scattered by dust particles present in earth's atmosphere
  1. they follow the laws of reflection and refraction
  1. they affect strong photographic plate as they are chemically more active than visible light
  1. for detecting purity in gems ,ghee etc

they are absorbed by glass but they pass through rock-salt

they are detected by heating process using blackened bulb thermometer

they are used in remote control of television and other gadgets

these waves are used in radar communication and in radio and television transmission