Question

Decibel is used to measure the intensity of 
1. Impulse
2. Sound
3. Light
4. Heat

Answer 1

Correct Answer - Option 2 : Sound

The correct answer is Sound.

• Sound
  • All the mechanical waves that occur in nature are called Sound waves
  • Sound waves can not travel in a vacuum.
  • The speed of the sound depends on the properties of the medium through which it travels.
  • It depends on the temperature of the medium, if temperature increases then the speed of sound also increases.
  • SI unit of Sound is Decibel.

• Impulse
  • ​If a large force is acting on a body for a very short time, then the product of this force and time is known as an impulse.
  • It is a vector quantity.
  • Its SI unit is N-s or Kg-m/s
• Light
  • Light is a form of energy that makes us see.
  • The speed of the light in the vacuum or in the air is 3*10⁸m/s.
  • The intensity of light can be measured with the help of a photometer.
• Heat
  • Heat is the form of energy that produces in us the sensation of warmth.
  • Its SI unit is Joule.
  • Heat flows from a higher temperature body to a lower temperature body.