Get premium membership and access revision papers with marking schemes, video lessons and live classes.
  OR
Processing. Please wait.

 Form 4 Physics Photoelectric effect online video lessons

What is photoelectric effect?

 (1m 41s)
208 Views     SHARE

Download as pdf file

Answer Text:
PHOTOELECTRIC EFFECT
-Photoelectric effect was discovered by Heinrich Hertz in 1887. Photoelectric effect is a phenomenon in which electrons are emitted from the
surface of a substance when certain electromagnetic radiation falls on it. Metal surfaces require ultra-violet radiation while caesium oxideneeds a visible light i.e. optical spectrum (sunlight).


|