In a ruby laser,an electron jumps from a higher energy level to a lower one.If the energy difference between the two levels is 1.8 eV,what is the wavelength of the emitted photon? ,h = 6.626 × 10-34 J • s,1 eV = 1.60 × 10-19 J)
A) 350 nm
B) 470 nm
C) 650 nm
D) 690 nm
E) 960 nm
Correct Answer:
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