Answer to Question #155613 in Optics for Huzaifa Rehman

Question

For an optical resonator, what is the physical significance of the equation, n(ν)dν = 8π(ν³/c³) dν? 

where ν stands for frequency, c for velocity of light, and Nd for neodymium.   

Answer 1

The equation is helpful in the determination of the frequency as well as spatial distribution mode of the laser beam generated from the optical resonator.

Consequently the expression acknowledges the importance of optical resonator in generation of laser beam.