Chemistry Class 11 NCERT Solutions: Chapter 2 Structure of Atom Part 3
Q: 6. Find energy of each of the photons which
(i) Correspond to light of frequency
(ii) Have wavelength of
(i) Energy (E) of a photon is given by the expression,
= frequency of light
Substituting the values in the given expression
(ii) Energy (E) of a photon having wavelength (λ)is given by the expression,
Substituting the values in the given expression of E:
Q: 7. Calculate the wavelength, frequency and wave number of a light wave whose period is .
Wavelength () of light
Substituting the value in the given expression of
Q: 8. What is the number of photons of light with a wavelength of 4000 pm that provide 1 J of energy?
wavelength of light
Substituting the values in the given expression of n:
Hence, the number of photons with a wavelength of 4000 pm and energy of photons.