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Followingresultsare observedwhensodiummetal isirradiated withdifferent wavelengthCalculate( a)thresholdwavelengthand( b)planks constant |
Answer» Solution : Takewavelength`(lambda_(N))`in nmabd`v_(n) ` in`mn^(_1)` of1,2,3 observation Thresholdwavelength`=(lambda_(0)nm =10 ^(9) lambda _(0) M` `= (hc )/( lambda_(0)xx 10^(9))` = workfunction Emitted energy(E ) = `(hc )/(10^(9)xx lambda _(n))` `lambda_(0)`= 530.89 nm =531thresholdwavelength Calculationof h planksconstant Putvalueof `lambda `and `lambda_(0)` in observation: `(hxx 3 xx 10^(8) (531 - 500))/(10^(9)(531) (500)) = (1)/(2) (9.1 xx 10^(31) kg) (2.55 xx 10^(5))^(2)` `=84464 xx 10^(-36)` `8.4464 xx 10^(34)` plankconstant |
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