In a two-beam interferometer the orange mercury line composed of two wavelengths `lambda_(1) = 576.97 nm` and `lambda_(2) = 579.03 nm` is employed. What is the least order of interference at which the sharpness of the fringe pattern is the worst ?

In Michelson's interferometer the yellow sodium line composed of two wavelengths lambda_(1) = 589.0 nm and lambda_(2) = 589.6nm was used. In the process of translational displacemnet of one of the mirrors the interference pattern vanished periodically (why?). Find the displacement of the mirror between two successive appearances of the sharpest pattern.

Bichromatic light is used in YDSE having wavelengths lambda_1 = 400 nm and lambda_2= 700nm . Find minimum order of bright fringe of lambda_1 which overlaps with bright fringe of lambda_2 .

Bichromatic light is used in YDSE having wavelengths lambda_1 = 400 nm and lambda_2= 700nm . Find minimum order of bright fringe of lambda_1 which overlaps with bright fringe of lambda_2 .

If an interference experiment is performed using two wavelengths close to each other, two interference patterns corresponding to the two wavelengths are obtained on the screen. The frings system remains distinct up to a point on the screen where the n^("th") order maximum of one wavelength falls on the n^("th") order minimum of the other wavelength. Suppose in Young's double sit experiment, sodium light composed of two wavelengths lambda_(1)and lambda_(2) close to each other (with lambda_(2) greater than lambda_(1) ) is used. The order n, up to which the fringes can be seen on the screen, is given by

If an interference experiment is performed using two wavelengths close to each other, two interference patterns corresponding to the two wavelengths are obtained on the screen. The frings system remains distinct up to a point on the screen where the n^("th") order maximum of one wavelength falls on the n^("th") order minimum of the other wavelength. Suppose in Young's double sit experiment, sodium light composed of two wavelengths lambda_(1)and lambda_(2) close to each other (with lambda_(2) greater than lambda_(1) ) is used. The order n, up to which the fringes can be seen on the screen, is given by

A double-slit interference pattern is formed on a screen in a Young's double slit experiment performed with light consisting of two wavelengths lambda_(1) = 6000A and lambda_(2) = 4800A. It is observed that the maximum of the 16^(th) order corresponding to lambda = 6000 A coincides with a maximum of the n order corresponding to lambda = 4800 A The value of n is