Home » Interesting Questions » Origin of colours and Atomic Spectra

Subscribe to this site by email

Loading

Origin of colours and Atomic Spectra

Ramu asked:

“we know about absorption & emission spectra. We get colours; so what is orgin of colurs? why the atoms emit colour spectra”

Ans:

Light is emitted when an excited atom returns to its ground state. When excited, the electrons jump from lower level to higher level absorbing the energy equal to the difference in energy levels corresponding to the orbits. When these electrons come back to the original states the energy is emitted.

As we know E = hν=hc/λ

Accordingly light of different wavelengths (and hence different colours) are emitted depending on the energy difference between the levels of transition.

For more details, please refer to these links.

  1. http://csep10.phys.utk.edu/astr162/lect/light/absorption.html
  2. http://en.wikipedia.org/wiki/Spectrum
  3. http://www.archive.org/stream/originofspectra00footuoft#page/n5/mode/2up
  4. http://en.wikipedia.org/wiki/Color
  5. http://www.newton.dep.anl.gov/askasci/phy05/phy05192.htm

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

Hits so far @ AskPhysics

  • 2,249,743 hits

Subscribe to AskPhysics via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 4,338 other subscribers

November 2020
M T W T F S S
 1
2345678
9101112131415
16171819202122
23242526272829
30  

Schrodinger’s Cat in Daily Life

%d bloggers like this: