Cool hydrogen emits a radio signal at the specific wavelength of 21 cm. What is the energy associated with this wavelength and how does it compare to the energy emitted by a photon of red light of wavelength 700 nm?

Cool hydrogen emits a radio signal at the specific wavelength of 21 cm. What is the energy associated with this wavelength and how does it compare to the energy emitted by a photon of red light of wavelength 700 nm?

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter6: Atoms And Spectra

Section: Chapter Questions

Problem 1P

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Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.

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