303
1.4k shares, 303 points

Knocking Electrons With Light-The Photoelectric Effect

Theory

During his experiments on electromagnetic radiation (to demonstrate light consists of e-m waves), Hertz noticed a spark between the two metallic balls when a high frequency radiation incident on it. This is called photoelectric effect. Photoelectric effect is the emission of electrons when electromagnetic radiations having sufficient frequency incident on certain metal surfaces. We call the emitted electrons as photoelectrons and the current they constitute as photocurrent. The phenomenon was first observed by Heinrich Hertz in 1880 and explained by Albert Einstein in 1905 using Max Planck’s quantum theory of light. As the first experiment which demonstrated the quantum theory of energy levels, photoelectric effect experiment is of great historical importance.

Do not forget to share your opinion with us to provide you with the best posts !

Like it? Share with your friends!

303
1.4k shares, 303 points

What's Your Reaction?

Dislike Dislike
594
Dislike
love love
2973
love
omg omg
2378
omg
scary scary
2081
scary
wtf wtf
1189
wtf

0 Comments

Your email address will not be published.