光電效應 入射光頻率愈高 光電子射出愈多

The higher the frequency of the incident light, the higher is the kinetic energy of emitted photo-electrons. This is a result of the photo-electric equation:

hf = KE - w
where h is Planck's constant
f is the frequency of the incident light
KE is the kinetic energy of the photoelectron
w is the work-function of the photosensitive surface

It is clear that the KE of photoelectrons increases with increase of light frequency.

The number of photo-electrons emitted depends on the intensity of the incident light. The stronger the light intensity, the more number of photoelectrons produced.

Intensity=強度 ??/
咁講咪姐係頻率同強度有關係??

補充天同知識長段野
Intensity=nhf，光強度高代表光子數目多，可以產生更多光電子。