Question

For the Fabry-Perot etalon of thickness d = 2.5 cm find: 

(a) the highest order of interference of light with wavelength λ = 0.50 μm; 

(b) the dispersion region Δλ i.e. the spectral interval of wavelengths, within which there is still no overlap with other orders of interference if the observation is carried out approximately at wavelength λ = 0.50 μm.

Answer 1

(a) We have 

= 5 pm on putting the values .