Blog tagged as Interference

Q- A thin film of index of refraction of 1.35 is placed over a glass plate of refractive index 1.67. White light incident on the film and it is noticed that only two visible colors in the reflected light are 400 and 525 nm. Determine the thickness of the film.

Solution:

Q- Two speakers are driven by the same oscillator with frequency f. They are located a distance d from each other on a vertical pole. A receiver initially at a distance L moves straight toward the pole along the horizontal line through lower speaker. (a) How many times it records minimum intensity o...

Q- Two identical thin, parallel and coherent beams of same intensity and wavelength λ are incident on a screen lies in the same plane at angles θ1 and θ2  with the normal. Find the fringe width on the screen.  

Solution: