JAMB Physics 2007 Objective — Question 12
Question 12 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.
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A photon of wavelength 6.0x10^-7m behaves like a particle of a certain mass. The value of that mass is [h=6.63x10^-34 Js, c=3x10^8]
- A. 1.1x10^-35kg
- B. 2.2x10^-27kg
- C. 3.5x10^-34kgCorrect
- D. 2.2x10^-35kg
Explanation
Using mc^2 = hc/lambda, so m = h/(lambda x c) = 6.63x10^-34 / (6x10^-7 x 3x10^8) = 3.68x10^-34kg (approx 3.5x10^-34kg).
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