Calculate the work function, Φ, of this metal.

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RaniyaFeroz_1E
Posts: 90
Joined: Wed Sep 30, 2020 9:32 pm

Calculate the work function, Φ, of this metal.

Postby RaniyaFeroz_1E » Sun Oct 18, 2020 9:24 pm

When a metal was exposed to photons at a frequency of 1.34×1015 s−1, electrons were emitted with a maximum kinetic energy of 4.00×10−19 J.
Calculate the work function, Φ, of this metal.

How should I do this problem?

Lillian
Posts: 69
Joined: Wed Sep 30, 2020 9:48 pm

Re: Calculate the work function, Φ, of this metal.

Postby Lillian » Sun Oct 18, 2020 9:30 pm

Calculate the energy of the proton, subtract the kinetic energy of the election from the energy of the proton, then you have the threshold energy :))))

Bella Bursulaya 3G
Posts: 139
Joined: Wed Sep 30, 2020 9:54 pm

Re: Calculate the work function, Φ, of this metal.

Postby Bella Bursulaya 3G » Sun Oct 18, 2020 9:32 pm

The equation kinetic energy of electron = hv (energy of photon) - work function, so plug in all your numbers and solve for work function!

Nicole Attiq 3D
Posts: 55
Joined: Wed Sep 30, 2020 9:35 pm

Re: Calculate the work function, Φ, of this metal.

Postby Nicole Attiq 3D » Sun Oct 18, 2020 9:48 pm

Use the equation Ek= hv-Φ.
Plug in -4*10^-19 = (6.63*10^-34)(1.34*10^15) - Φ
Then solve for the work function. You should get 4.88 *10^-19. Hope that helped!


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