Wave Mechanics And Optics Mock Tests

In a diatomic linear chain with alternating masses M and m connected by springs of constant K, the dispersion relation at the Brillouin zone boundary (ka = π) shows:

The Q-factor of a laser determines:

The index of refraction of a material with relative permittivity ε_r = 4 and relative permeability μ_r = 1 is:

The critical angle for total internal reflection at the interface between glass (n = 1.5) and air is:

A CO₂ laser operates on the principle of:

The numerical aperture (NA) of an optical fiber with core refractive index n₁ = 1.5 and cladding refractive index n₂ = 1.48 is: