Two flat mirrors form an angle close to ${180}^{\circ }$ as shown in figure. A source of light S is placed at equal distances b from the mirrors. A screen is at distance a from mirrors. Wavelength of light is $\lambda$ and there is a shield C that block light passing directly to the screen, then

Q.

A concave mirror of radius of curvature 10 cm is cut into two equal parts, slightly separated and placed in front of a monochromatic line source S of wavelength 2000 $\hat{A}$ as shown in figure. Consider only interference in reflected light after first reflection from mirrors. Assume direct light from S is blocked from reaching the screen

Assume A is the position of first order maxima on the screen. Now the point object is moved away from normal to screen with constant speed, then:

Q. In Lloyd's mirror experiment (Fig.) a light wave emitted directly be the source S (narrow slit) interferes with the wave reflected form a mirror M. As s result, an interference fringe pattern is formed on the screen Sc. the source and the mirror are separated by a distance l=100 cm. At a certain position of the source, the fringe width on the screen was equal to Δx=0.25 mm, and after source was moved away from the mirror plane by Δh=0.60mm, the fringe width decreased η=1.5 times. Find the wavelength of light.

Q. Two plane mirrors, a source $S$ of light, emitting monochromatic rays of wavelength $\lambda$ and a screen are arranged as shown in figure. If angle $\theta$ is very small, find the fringe width of the interference pattern formed by reflected rays.

Q. Two sources give interterence pattern which is observed on a screen, placed at a distance $D$ from the sources. The fringe width is given as $2W$. If the distance of sources from the screen is doubled, then the fringe width will

Q. In a Lloyd's mirror experiment, a light wave emitted directly by the sources $S$ interferes with the reflected light from the mirror. The screen is $1m$ away from the source $S$. The size of the fringe width is $0.25mm$. The source is moved $0.6mm$ above the initial position, the fringe width decreases by $1.5$ times. If the light wave used is in the wavelength $2.4\times {10}^{-x}$, find the value of $x$.