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I am reviewing my notes in the photoelectric effect section and I wrote down that,"Quantum Mechanic's description of light is why short wavelengths of light can eject electrons from metal surfaces, while longer wavelengths don't". Can anyone explain why this property occurs to me?
The quantum mechanic description of light is that an object usually displays particle-like behavior, but wave-like behavior occurs when an object is small (>10^-15 m small). Through the photoelectric experiment, it was seen that light acted as more of a particle since increasing the amplitude/intensity of the wave did not result in a change in the KE of the light, but an increase in frequency increased the KE.
Looking at the speed of light equation, as the wavelength increases, the frequency increases. Seeing that higher frequency light can eject electrons while higher intensity light cannot, this proves the photon properties of light.
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