Quiz Bank

Is energy quantized in classical physics?

quantization of energy
quantization of energy

No, according to classical wave theory the emission of electromagnetic radiations from the surface is continuous. So energy is not quantized in classical physics. But according to photon theory, the emission of electromagnetic radiation from the surface is discontinuous. Energy is quantized and radiations are emitted in the form of bundles of energy is called quanta or photon. Each photon has energy given as:

E  = h ν

Where h is the Planck constant and ν is the frequency.

If You want to learn the quantization of energy in terms of video then watch this video:

What is quantization of energy?

The assumptions made by Plank in deriving his radiation law and their consequences along with the significance of Plank’s constant h were not immediately clear to his contemporaries and even to Plank himself. Plank derived his radiation law by analyzing the interaction between radiation in the cavity volume and the atoms of the cavity walls. He assumed that these atoms behave like tiny oscillators each with a characteristic frequency of oscillation.
These oscillations radiation energy into the cavity and absorb energy from it. As such, the characteristics of the oscillators that generation.
Classically, the energy of the tiny oscillators has a smooth continuous behavior or acts as a continuous variable. This continuous behavior of energy can be assigned to large scale oscillators such as pendulums and mass-spring systems. In order to derive Plank’s radiation law, it is necessary to make a radical assumption e.g atomic oscillators may not emit or absorb any energy E in a continuous fashion but only in a discrete fashion defined by:
E =nhν   ,n=1,2,3    …………….(1)
Where ν is the oscillator frequency. We see that Plank’s constant h was introduced into physics for the first time in connection with quantization of energy of atomic oscillators and integer n is a quantum number. It follows from equation (1) that oscillator energy levels are evenly spaced with an interval of hν.
The assumption about quantization of energy is a radical one and Planck himself remained reluctant to accept it for many years. From experience, we know that a pendulum can oscillate with any reasonable total energy and not only with certain related values. As friction causes the amplitude of the pendulum to decay it appears that the energy of the pendulum is dissipated in a continuous fashion but not in jumps or “quanta”.Since the Planck constant is so small, the jump may be there but too small for us to detect, and hence we cannot dismiss energy quantization.
Related topic on our website are:

Related Articles


  1. Having read this I belieeved it was rather informative.
    I appreciate you taking the time and energy to put tnis article together.
    I once again find myself spending way too much time both reading and posting comments.
    But so what, it was still worthwhile!

  2. I really want to show you that I am new to posting and absolutely liked your write-up. Most likely I am prone to store your blog post . You definitely have fabulous article blog posts. Love it for giving out with us your very own site report

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Back to top button

Adblock Detected

Please consider supporting us by disabling your ad blocker