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November 01, 2025, 09:28:22 am

Author Topic: Theory question  (Read 500 times)  Share 

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iroflmfao

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Theory question
« on: October 27, 2011, 01:19:43 pm »
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Explain why the particle model provides a better explanation for the existence of a threshold frequency, regardless of light intensity, than the wave model. 3 marks

my answer.
The particle model shows that photons have a fixed energy that is related to frequency. An increase in intensity results from a greater no of photons rather than a greater amplitude of wave. According to the wave model light is a continuous wave and the intensity is related to amplitude, which measures the energy of the wave. Therefore an electron can absorb any amount of light energy, depending on the time interval is is expose to the light wave.

Is my answer off track ? In the solutions they were talking about work function ? How many marks do i get ?

Shark 774

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Re: Theory question
« Reply #1 on: October 27, 2011, 03:00:09 pm »
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Explain why the particle model provides a better explanation for the existence of a threshold frequency, regardless of light intensity, than the wave model. 3 marks

my answer.
The particle model shows that photons have a fixed energy that is related to frequency. An increase in intensity results from a greater no of photons rather than a greater amplitude of wave. According to the wave model light is a continuous wave and the intensity is related to amplitude, which measures the energy of the wave. Therefore an electron can absorb any amount of light energy, depending on the time interval is is expose to the light wave.

Is my answer off track ? In the solutions they were talking about work function ? How many marks do i get ?

Sounds good to me.