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.

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

If half of reflecting surface of upper part of mirror is painted black then choose correct option

Q. In YDSE apparatus shown in figure wavelength of light used is $\lambda$. The screen is moved away from the source with a constant speed $v$. Initial distance between screen and plane of slits was $D$ and at point $P$ on screen, $n^{th}$ order bright fringe is observed.

As the screen moves away value of $n$ will

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 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. In YDSE the first bright fringe after the centre fringe is observed at P. If the screen is continuously moved away from plane of slits, then ratio of intensity at point P to intensity at point O [center of screen]