Wave Optics

A linear aperture whose width is $0.02 cm$ is placed immediately in front of a lens of focal length $60 cm.$ The aperture is illuminated normally by a parallel beam of wavelength $5\times\,10^{-5}\mathrm{}cm$. The…

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:

Two slits in Young's experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the interference pattern, $\frac{I_{max}}{I_{min}}$ is:

A beam of light of $\lambda\,=600nm$ from a distant source falls on a single slit $1mm$ wide and the resulting diffraction pattern is observed on a screen $2m$ away. The distance between first dark fringes on either…

In the Young's double slit experiment the intensity of light at a point on the screen where the path difference is $\lambda\,$ is $K,$ ($\lambda\,$ being the wave length of light used). The intensity at a point where…

An unpolarised light beam of intensity $2I_{0}$ is passed through a polaroid $P$ and then through another polaroid $Q$ which is oriented in such a way that its passing axis makes an angle of $30^{\circ}$ relative to…

In a Young's double slit experiment, the slits are separated by $0.3\mathrm{mm}$ and the screen is $1.5m$ away from the plane of slits. Distance between fourth bright fringes on both sides of central bright fringe is…

Two wavelengths $\lambda_1$ and $\lambda_2$ are used in Young's double slit experiment. $\lambda_1=450 \mathrm{~nm}$ and $\lambda_2=650 \mathrm{~nm}$. The minimum order of fringe produced by $\lambda_2$ which overlaps…

In a Young's double slit experiment, two slits are located 1.5 mm apart. The distance of screen from slits is 2 m and the wavelength of the source is 400 nm. If the 20 maxima of the double slit pattern are contained…

Two satellites revolve around a planet in coplanar circular orbits in anticlockwise direction. Their period of revolutions are $1$hour and $8$ hours respectively. The radius of the orbit of nearer satellite is…

A parallel beam of monochromatic light of wavelength $5000\overset{o}{A}$ is incident normally on a single narrow slit of width $0.001\mathrm{mm}$. The light is focused by convex lens on screen, placed on its focal…

The ratio of the power of a light source $S_1$ to that the light source $S_2$ is $2 . S_1$ is emitting $2 \times 10^{15}$ photons per second at 600 nm . If the wavelength of the source $S_2$ is 300 nm , then the number…