In an interference experiment,interference fr | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The wavelength $\lambda$ of light in a vacuum is given by $\lambda = \frac{\lambda_0}{n}$,where $\lambda_0$ is the wavelength in vacuum and $n$ is

Vedclass · Accepted Answer

The width of the interference fringes increases.

Vedclass · Answer

(D) The wavelength $\lambda$ of light in a vacuum is given by $\lambda = \frac{\lambda_0}{n}$,where $\lambda_0$ is the wavelength in vacuum and $n$ is the refractive index of the medium. Since the refractive index of air $(n_{air} \approx 1.0003)$ is greater than that of a vacuum $(n_{vac} = 1)$,the wavelength $\lambda$ increases when the chamber is evacuated.Since the fringe width $\beta$ is given by $\beta = \frac{\lambda D}{d}$,where $D$ is the distance to the screen and $d$ is the slit separation,$\beta$ is directly proportional to $\lambda$ $(\beta \propto \lambda)$.Therefore,as the wavelength increases,the width of the interference fringes increases.

In an interference experiment,interference fringes are observed on a screen when the chamber is filled with air. If the entire chamber is evacuated and observed carefully,then .....

Similar Questions

In Young's double slit experiment,if the wavelength of the light used is doubled and the distance between the two slits is halved,the resultant fringe width becomes $n$ times the initial fringe width. Find the value of $n$.

In Young's double-slit experiment,we get $10$ fringes in the field of view using monochromatic light of wavelength $4000 \text{ } \mathring{A}$. If we use monochromatic light of wavelength $5000 \text{ } \mathring{A}$,then the number of fringes obtained in the same field of view is

In $YDSE$,the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width is

Who was the first to study the phenomenon of interference of light?

Vedclass Test Series

Exam Paper Generator

Online Exam Module