2. The second spectral line in the Balmer series in the hydrogen spectrum, called the Hp line, results from a transition from the n = 4 state to the n= 2 state. (Remember, a photon has energy E = hf and the speed of light (c) is related to the frequency (f) and the wavelength (A) of the light by the expression c = fλ. The speed of light in a vacuum is c = 2.99 x 108 m/s.) a) Calculate the energy, in J, and wavelength, in nm, of the photon emitted in this transition. b) What is the momentum of the photon emitted in this transition? c) In which region of the electromagnetic spectrum does this line appear: visible, ultraviolet or infrared? If visible, what colour is the light?

2. The second spectral line in the Balmer series in the hydrogen spectrum, called the Hp line, results from a transition from the n = 4 state to the n= 2 state. (Remember, a photon has energy E = hf and the speed of light (c) is related to the frequency (f) and the wavelength (A) of the light by the expression c = fλ. The speed of light in a vacuum is c = 2.99 x 108 m/s.) a) Calculate the energy, in J, and wavelength, in nm, of the photon emitted in this transition. b) What is the momentum of the photon emitted in this transition? c) In which region of the electromagnetic spectrum does this line appear: visible, ultraviolet or infrared? If visible, what colour is the light?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter11: Gravity, Planetary Orbits, And The Hydrogen Atom

Section11.5: Atomic Spectra And The Bohr Theory Of Hydrogen

Problem 11.4QQ

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