Question

sodim spreet lamps gives off a characteristic yellow light of wavelength 588nm. calculate energy of photon
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Answer 1

λ=588nm=588×10 ^−9m

c=3×10 -^8 ms

E=N0hν=NOhc/λ = (6.02×10^23)×(6.63×10 ^−34)×(3×10^8 ) Jmol ^−1

=2.036×10 ^6 Jmol ^−1

=2.036×10 ^3 kJmol ^−1

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