Question about 1.33 Part C


Moderators: Chem_Mod, Chem_Admin

Annah Khan 1B
Posts: 28
Joined: Fri Jul 22, 2016 3:00 am

Question about 1.33 Part C

Postby Annah Khan 1B » Sat Jul 01, 2017 2:04 pm

The velocity of an electron that is emitted from a metallic surface by a photon is 3.6 x 10^3 km/s.
(a) What is the wavelength of the ejected electron?
(b) No electrons are emitted from the surface of the metal until the frequency of the radiation reaches 2.50 x 10^16 Hz. How much energy is required to remove the electron from the metal surface?
(c) What is the wavelength of the radiation that caused photoejection of the electron?

I am confused as to how to go about solving part C. What equation is necessary to solve it, and how does it have anything to do with kinetic energy?

Dabin Kang 1B
Posts: 22
Joined: Fri Jun 23, 2017 11:39 am
Been upvoted: 1 time

Re: Question about 1.33 Part C

Postby Dabin Kang 1B » Sat Jul 01, 2017 3:35 pm

Use

Find the energy of the photon:







Use the energy of the photon to solve for frequency:







Solve for wavelength:






Return to “DeBroglie Equation”

Who is online

Users browsing this forum: Anil Chaganti 2C and 3 guests