B M Sharma Solutions for Chapter: Wave Optics, Exercise 2: DPP

Two coherent sources of equal intensity produce maximum intensity of $100$ units at a point. If the intensity of one of the sources is reduced by $36\%$ by reducing its width then, the intensity of light at the same point will be,

In Young's double-slit experiment, $I_0$ is the intensity at the central maximum and $\beta$ is the fringe width. The intensity at point $P$ at a distance $x$ from the centre will be,

The path difference between two interfering waves of equal intensities, at a point on the screen, is $\frac{\lambda }{4}$. The ratio of intensity at this point and that at the central fringe will be,

 

In Young's double-slit experiment, we get $60$ fringes in the field of view of monochromatic light of wavelength $4000 \stackrel{\mathrm{o}}{\mathrm{A}}$. If we use monochromatic light of wavelength $6000 \stackrel{\mathrm{o}}{\mathrm{A}}$ then, the number of fringes obtained in the same field of view is,

The figure shows a double-slit experiment, where $P$ and $Q$ are the slits. The path lengths $PX$ and $QX$ are $n\lambda$ and $(n+2)\lambda$, respectively, where $n$ is a whole number and $\lambda$ is the wavelength. Taking the central fringe as zero, what is formed at $X$?

In a two-slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the slits. If the screen is moved by $5\times {10}^{-2} \mathrm{m}$ towards the slits, the change in fringe width is $3\times {10}^{-5} \mathrm{m}$. If the separation between the slits is ${10}^{-3} \mathrm{m}$, the wavelength of light used is,

In Young's double-slit experiment, how many maxima can be obtained on a screen (including the central maximum) on both sides of the central fringe if $\lambda =2000 \stackrel{\mathrm{o}}{\mathrm{A}}$ and $d=7000 \stackrel{\mathrm{o}}{\mathrm{A}}$?

In a Young's double-slit experiment, the separation between two slits is $d$ and wavelength of light is $\lambda$. The intensity of light falling on slit $1$ is four times the intensity of light falling on slit $2$. Find the correct choices.