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Author Question: A hypothetical particle has a mass of 510 MeV/c2. If such a particle at rest decays into two ... (Read 309 times)

meagbuch

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on: Jul 29, 2018
A hypothetical particle has a mass of 510 MeV/c2. If such a particle at rest decays into two gamma-ray photons, what is the wavelength of each photon?
 
  (1 eV = 1.60  10-19 J, c = 3.00  108 m/s, h = 6.626  10-34 J s)

Question 2

A nearsighted person has a far point that is 4.2 m from his eyes. What focal length lenses must he use in his contact lenses to allow him to focus on very distant mountains?
 
  A) -4.8 m B) -5.2 m C) 4.2 m D) -4.2 m E) 5.2 m


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bhavsar

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Reply #1 on: Jul 29, 2018
Answer to Question 1

4.87  10-15 m

Answer to Question 2

D


meagbuch

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Reply #2 on: Jul 29, 2018
TY


bhavsar

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Reply #3 on: Jul 29, 2018
You're welcome


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