CBSE Class 11-science Answered

Sir plz solve it explaining me all the concepts being applied here,Thanks

Asked by vishakhachandan026 | 25 May, 2019, 10:17: PM

Expert Answer

In photo electric effect-

E equals K. E. plus W space space space space E equals fraction numerator h c over denominator lambda end fraction space space space equals h c R open parentheses 1 over n subscript 1 squared minus 1 over n subscript 2 squared close parentheses space space equals h c R left parenthesis 1 minus 1 over 9 right parenthesis space space space equals 19.38 cross times 10 to the power of negative 19 end exponent space J 1 J equals 6.24 cross times 10 to the power of 18 space end exponent space e V space space space space E equals 12.09 space e V K. E. equals 12.09 minus 3 space space space space space space space space space equals 9.09 space e V space space space space space space space space space space space

This maximum Kinetic energy is known as stopping potentail. Value of maximum kinetic energy and stopping potential will be=9.09 eV

Answered by Ravi | 27 May, 2019, 03:30: PM

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