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Hi there.

I am a student from Spain and I am about to join the University but I have to pass physics at High School.

Here It is:

This is what I did.

[tex]\[E = \phi + Ec\][/tex]

[tex]\[h\nu = h\nu _0 + \frac{1}{2}mv^2 \][/tex]

When I got to this point, I assumed that the electron's velocity would be zero and then:

[tex]\[\nu = \frac{{3.8}}{{6.63\cdot10^{ - 34} }} = 5.73\cdot10^{33}[/tex]

Hertzios

Is everything alright?

I am a student from Spain and I am about to join the University but I have to pass physics at High School.

Here It is:

The work of extracting an Eletron in a metal is 3.8 eV. Calculate the minimum frequency needed to start the electron.The work of extracting an Eletron in a metal is 3.8 eV. Calculate the minimum frequency needed to start the electron.

This is what I did.

[tex]\[E = \phi + Ec\][/tex]

__Regarding to Einstein's equation of photoelectric effect:__[tex]\[h\nu = h\nu _0 + \frac{1}{2}mv^2 \][/tex]

When I got to this point, I assumed that the electron's velocity would be zero and then:

[tex]\[\nu = \frac{{3.8}}{{6.63\cdot10^{ - 34} }} = 5.73\cdot10^{33}[/tex]

Hertzios

Is everything alright?

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