Maximum wavelength capable of ejecting an electron
Favorites|Homepage
Subscriptions | sitemap
HOME > Chemistry > Maximum wavelength capable of ejecting an electron

Maximum wavelength capable of ejecting an electron

[From: ] [author: ] [Date: 11-09-28] [Hit: ]
KE = E(photon) - WorkFunction = 6.52E-19 - 2.84E-19 = 3.w = hc/E = 6.626E-34 * 3E8 / 3.68E-19 = 5.......
A photon of radiation of wavelength 305 nm ejects an electron from a metal with kinetic energy 1.77 eV. What is the maximum wavelength capable of ejecting an electron from the metal?

-
1 eV = 1.60E-19 J, so 1.77 eV = 2.84E-19 J

E = hc/w = 6.626E-34 * 3E8 / 305E-9 = 6.52E-19 J

KE = E(photon) - WorkFunction = 6.52E-19 - 2.84E-19 = 3.68E-19 J

E = hc/w

w = hc/E = 6.626E-34 * 3E8 / 3.68E-19 = 5.41E-7 m = 541 nm
1
keywords: wavelength,ejecting,electron,capable,an,of,Maximum,Maximum wavelength capable of ejecting an electron
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .