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1. The problem statement, all variables and given/known data

When radiation of wavelength 350nm is incident on a surface, the maximum kinetic energy of the photoelectrons is 1.2ev. What is the stopping potential for a wavelength of 230nm?

2. Relevant equations

[tex]\phi[/tex]=hc/[tex]\lambda[/tex]-eV0( V0= V 'nought')

I am unsure as to what other equations can be used.

3. The attempt at a solution

My attempt was to calculate [tex]\phi[/tex] for the 350nm wavelength, and then do the same for the 230nm wavelength.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Modern Physics question

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