Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 11
        Sir what is radiation and what is quantum modelAnd how they emitted
one year ago

Answers : (1)

22958 Points

Quantum Theory of Radiation

The distribution of energy in the spectrum of radiations of a hot body cannot be explained by applying the classical concepts of physics. Max Planck gave an explanation to this observation by his Quantum Theory of Radiation. His theory says: –

a)      The Radiant energy is always in the form of tiny bundles of light called quanta i.e. the energy is absorbed or emitted discontinuously.

b)      Each quantum has some definite energy E, which depends upon the frequency of the radiations.


Here, E is the energy of each quantum in Joules, γ is the frequency of the radiations in s-1, h is known as Planck’s constant (a fundamental constant), h=6.626X10-34 J s.

Also, E=hcw, where w is known as wave number. W= (1/λ) m-1.

From above two equations, it is evident that γ=c/λ=cw.

c)       The energy emitted or absorbed by a body is always a whole multiple of a quantum i.e. a body cannot absorb or emit energy in fractions of quantum. This concept is known as quantization of energy.

Edγ= ((8πhγ3)/c3 ) X (dγ)/(exp(hγ/kT)-1)

one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 141 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details