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Midterm Practice Test #4b

Posted: Sat Dec 09, 2017 10:44 pm
by Grace Lee 3G
A newly designed laser pointer with a certain frequency is pointed at a sodium metal surface. An electron is ejected from the metal surface with wavelength 1.10 nm. What is the frequency of the light from the laser pointer? The work function of sodium is 150.6 kJ∙mol-1.

I got 2.89 x 10^17 Hz and was just wondering if it was correct?

Re: Midterm Practice Test #4b

Posted: Sun Dec 10, 2017 9:23 am
by Chem_Mod
Hi Grace,

The correct answer is 6.78x10^14 Hz.

Re: Midterm Practice Test #4b

Posted: Tue May 08, 2018 9:29 pm
by Nina_A_Section1E
How did you get this answer?

Re: Midterm Practice Test #4b

Posted: Tue May 08, 2018 11:57 pm
by Chem_Mod
Grace Lee 3G wrote:A newly designed laser pointer with a certain frequency is pointed at a sodium metal surface. An electron is ejected from the metal surface with wavelength 1.10 nm. What is the frequency of the light from the laser pointer? The work function of sodium is 150.6 kJ∙mol-1.

I got 2.89 x 10^17 Hz and was just wondering if it was correct?
Nina_A_Section1E wrote:How did you get this answer?


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