Midterm Practice Test #4b

Grace Lee 3G
Posts: 19
Joined: Fri Sep 29, 2017 7:07 am

Midterm Practice Test #4b

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?

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: Midterm Practice Test #4b

Hi Grace,

The correct answer is 6.78x10^14 Hz.

Nina_A_Section1E
Posts: 31
Joined: Fri Apr 06, 2018 11:01 am
Been upvoted: 1 time

Re: Midterm Practice Test #4b

How did you get this answer?

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: Midterm Practice Test #4b

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?

See related topics
viewtopic.php?f=157&t=31249

viewtopic.php?f=14&t=31435