p45_039 - 39. (a) We substitute = (2898 m K)/T into the...

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39. (a) We substitute λ = (2898 µ m · K) /T into the result of Exercise 3 of Chapter 39: E = (1240 eV · nm) . First, we convert units: 2898 µ m · K=2 . 898 × 10 6 nm · K and 1240 eV · nm = 1 . 240 × 10 3 MeV · nm. Hence, E = (1 . 240 × 10 3 MeV · nm) T 2 . 898 × 10 6 nm · K =(4 . 28 × 10 10 MeV / K) T. (b) The minimum energy required to create an electron-positron pair is twice the rest energy of an
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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