Q. Please answer the below question.

Q. Please answer the below question. Calculate tne Calculate the energy ofa photon Of red light having wavelength 650 nrn, Calculate the wavelength of the spectral lines of Balmer series when n • 3, The energy of the electron in the second and the third orbit of Hydrogen atom is -5.42 x 10-'7 ergs. and •2.41 10 ergs, Calculate the wavelength ofthe emitted radiation when electron drops from 3'd to 2nd orbit. light of frequency In photo electric effect experiment, irradiation of 52 x 101 a s-l yields an electron with maximum kinetic energy L3 x 10-19 L Calculate the threshold frequency. The mass of an electron is 9.1 x IO- kg. If its kinetic energy is 3.0 x J, calculate its wave I Calculate the wavelength of the radiatiow_mitted producing a line in Lyman series an electron falls from fourth stationary state in hydrogcni spectrum. (RH = I x 107) What are the frequency and the of a photon emitted during a transition from n 5 to n — 2 state in the hydmgcn atLNn? Calculate the wave number for the longest wavelength transition in the Balmer series of

Dear Student, 
6
From de Broglie’s equation,

Given,

Kinetic energy (K.E) of the electron = 3.0 × 10–25 J

Substituting the value in the expression of λ :

Hence, the wavelength of the electron is 8.9625 × 10–7 m.

7.
1) For Lyman series,
n1 = 1
Here, n2 = 4

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