Increasing intensity causes a contradiction in classical physics?

by Turion
Tags: classical, contradiction, increasing, intensity, physics
Turion is offline
Sep9-13, 01:38 PM
P: 148
According to my prof, increasing intensity of the light source in a photocell for the photoelectric effect does not increase the kinetic energy of photoelectrons emitted. Instead, the number of electrons emitted (and current) increases. Changing the colour of the light causes an increase in kinetic energy of the photoelectrons emitted.

Why is this a contradiction in classical physics as my prof claims?
Phys.Org News Partner Physics news on
Sensitive detection method may help impede illicit nuclear trafficking
CERN: World-record current in a superconductor
Beam on target: CEBAF accelerator achieves 12 GeV commissioning milestone
ZapperZ is offline
Sep9-13, 02:22 PM
ZapperZ's Avatar
P: 28,783
Are you familiar or have read up on the famous photoelectric effect?

dauto is offline
Sep9-13, 02:29 PM
P: 1,196
Classical physics states that the intensity of light should be proportional to the square of the amplitude of the wave and should have nothing to do with its frequency.

Register to reply

Related Discussions
Contradiction in Wave Amplitude, intensity and Conservation of Energy? Introductory Physics Homework 3
Means for increasing the intensity of electrical oscillations Electrical Engineering 3
physics problem/contradiction Classical Physics 10
Contradiction in Relativistic Simultaneity in Taylor-Wheeler Spacetime Physics? Special & General Relativity 61
What causes the feedback (a noise increasing in intensity and pitch)? Electrical Engineering 1