electrons are emitted with zero velocity from a certain metal surface when it is exposed to radiations of wavelength 7000 A0 . The work function of the metal is ?
velaga divakar chinna , 5 Years ago
Grade 12th pass
2 Answers
Arun
Last Activity: 5 Years ago
c = νλ∴ νo = c/λo = 3.0×108 ms-1/7000×10-10 m = 4.29×1014 s-1Work function (wo) = hνo = 6.626×10-34 Js×4.29×1014 s-1 = 2.842×10-19 J
Vikas TU
Last Activity: 5 Years ago
E=hc/lambda. also E=hvo C/lambda= vo 3 x 10^8 / 7000 x 10^-10 . ( 1 A = 10-10) vo = 4.281 x 10^14 s^-1 w0 = hv0 = 6.63* 10^-34 * 4.28*10^14 => 28.41 *10^-20 J
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free