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If critical wavelength of a metal surface is 2000 angstrom . Then find the wavelength of photon which emit photoelectrons with kinetic energy maximum twice of those produce at 1500 angstrom

Sakshi Singh , 5 Years ago
Grade 11
anser 1 Answers
Piyush

Last Activity: 5 Years ago

Threshold wavelength is 2000 angstrom
By using formula E=h×v E is 9.939×10^-19
Energy produced by wavelength of 1500 angstrom is 13×10^-19
So kinetic energy is 4.1×10^-19J 
Twice kinetic energy is equal to 8.2×10^-19J
Total energy become 18.1×10^-19J
Corresponding wavelength to the energy is 1.1×10^-19

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