Optical Path Length In Ydse

If d is the real path length, then the optical path length (in medium of refractive index mu ) is equal to

Optical Path Fringes Fringe Width Modification in YDSE

Explain what is optical path length . How is it different from actual path length ?

The figure shows a transparent slab of length m placed in air whose refractive index in x direction varies as mu = 1 + x^(2)(0 lt x lt 1) . The optical path length of ray R will be

A ray of light AO in vacuum is incident on a glass slab at angle 60^(@) and refracted at angle 30^(@) along OB as shown in the figure.The optical path length of light ray from A to B is

STATEMENT- 1 In passing through a lens or prism ,the phase difference between two waves doesnot change. STATEMENT 2 the optical path lengths of all rays are same.

Geometrical Optical Path |Displacement Of Fringes|Questions

Maths Of Ydse

Explain path length.