Test #2 Question 3C

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Cecilia Jardon 1I
Posts: 74
Joined: Fri Sep 28, 2018 12:16 am

Test #2 Question 3C

Postby Cecilia Jardon 1I » Wed Oct 31, 2018 7:55 pm

For this question, I used the kinetic energy formula to calculate the velocity of the electron and got 6.626 x 10 ^-25 m/s. And then used the wavelength = h/mv to find the wavelength of the electron. I plugged in the given and got wavelength= (6.626 x 10^-34 Js) /((9.1095x 10 ^31 kg) (6.626 x 10 ^-25 m/s) ). This gave me the wavelength of the ejected electron to be 1.09 x 10 ^24 m . Is this the correct way to do it? If not, can someone please explain how to do this problem.
Last edited by Cecilia Jardon 1I on Thu Nov 01, 2018 2:51 pm, edited 1 time in total.

Veronica Soliman 4H
Posts: 51
Joined: Fri Sep 28, 2018 12:28 am

Re: Test #2 Question 4C

Postby Veronica Soliman 4H » Wed Oct 31, 2018 10:20 pm

Hi I haven't received my test 2 back yet, but when I do, I will be sure to reply here. Could you post the actual question on here so I can assist?

Cecilia Jardon 1I
Posts: 74
Joined: Fri Sep 28, 2018 12:16 am

Re: Test #2 Question 3C

Postby Cecilia Jardon 1I » Thu Nov 01, 2018 11:37 pm

In an x-ray photoelectron experiment, chromium metal is irradiated with light of wavelength 9.020x10 ^-11 m
b) How does KE of the e- change as x-ray intensity is increased?
c) Calculate the wavelength of the ejected electron.
Can you please explain both.


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