Stopping Potential of Electrons for Different Wave Lengths

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The stopping potential for electrons emitted from a surface illuminated by light of wavelentgh 491 nm is 0.710V. When the incident wavelentgh is changed to a new value, stopping potential is 1.43V.

a) What is this new wavelentgh?

b) What is the work function for the surface?



hf = Kmax


do you have an idea ?
please help.
 
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getcarter said:
The stopping potential for electrons emitted from a surface illuminated by light of wavelentgh 491 nm is 0.710V. When the incident wavelentgh is changed to a new value, stopping potential is 1.43V.

a) What is this new wavelentgh?

b) What is the work function for the surface?



hf = Kmax


do you have an idea ?
please help.

Hi getcarter. You have to show what you've tried first...(same goes for your Compton shift problem)...
 
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