Ray Optics and Optical Instrument - Reversibility of Light

Law of Reversibility: When the ray of light reverse back to its own path after refraction and reflection, this phenomenon is called Reversibility.

Ray Optics and Optical Instrument  - Reversibility of Light

Multiply both equation.

1n2 X 2n1 = 1

When the light ray passes though multi medium

At 1st Interface

At 2nd Interface

At 3rd interface

Ray Optics and Optical Instrument  - Reversibility of Light

Ray Optics and Optical Instrument  - Reversibility of Light

Multiplying equation (i), (ii) & (iii)

Ray Optics and Optical Instrument  - Reversibility of Light

Apparent depth

Ray Optics and Optical Instrument  - Reversibility of Light

Ray Optics and Optical Instrument  - Reversibility of Light

                     Ray Optics and Optical Instrument  - Reversibility of Light

If C is very close to A, then OC = OA = real and IC = IA = Apparent

                  Ray Optics and Optical Instrument  - Reversibility of Light

2n1 = Apparent Depth / Real Depth

apparent depth = n X real depth

Change in depth = real depth – apparent depth

Shift in depth = OA - 2n1 X OR

                         = OA (1 - 2n1)

Ray Optics and Optical Instrument  - Reversibility of Light

 

Post By : Nek Singh Yadav 02 May, 2020 126 views Physics