riamu
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With regards to wave model of light does using a low frequency radiation (eg infrared radiation) but with a greater intensity decrease the time delay for sufficient energy to build up to cause electron emission?
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nzy
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The intensity of a wave is the power (energy per second) transferred per unit area. If the intensity is greater, it takes less time for the same amount of energy to be transferred to the same area.
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riamu
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(Original post by nzy)
The intensity of a wave is the power (energy per second) transferred per unit area. If the intensity is greater, it takes less time for the same amount of energy to be transferred to the same area.
you are right but this is not relevant to the question above
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Stonebridge
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(Original post by riamu)
you are right but this is not relevant to the question above
The answer was relevant.
You asked what happens if you increase the intensity of the light.
The answer is, if you do that, you provide more energy per second and therefore would reduce the expected delay time. Of course this doesn't happen, hence the photon theory of light.
What you need to realise, is that according to the wave theory, the energy transferred per second depends on the intensity. Indeed, that is the definition of intensity. So if you increase it, irrespective of whatever frequency the light is, you provide more energy and would expect either a shorter delay (there was never a delay) and the emitted electrons to have more energy. (They didn't, there were more of them, though.)
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