Rami Arieli: "The Laser Adventure" Chapter 4 Section 1, page 7
Example 4.1 Frequencies and wavelengths of possible modes in an optical cavity

The length of an optical cavity is 25 [cm].

The index of refraction is 1.0.

Calculate the frequencies nm and wavelengths lm of the following modes:

  1. m =1.
  2. m = 10.
  3. m = 100.
  4. m = 106.
Solution to Example 4.1
 
 
 
1
 
n1 = 6*108 [Hz]
Radio Wave
2
 
n2 = 6*109 [Hz]
Short Wave Communication
3
 
n3 = 6*1010 [Hz]
Microwaves
4  
n4 = 6*1014 [Hz]
Green Color