Author Question: The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy ... (Read 68 times)

rmenurse · **on:** Jul 29, 2018

The wavelength of a ruby laser is 694.3 nm.

What is the energy difference between the two energy states involved in laser action? (c = 2.9979 108 m/s, h = 6.626 10-34 J s, 1 eV = 1.6022 10-19 J)
A) 1.537 eV
B) 1.646 eV
C) 1.786 eV
D) 1.812 eV
E) 3.572 eV

Question 2

According to the second law of thermodynamics, the entropy of any system always increases.

A) True B) False