Physics Optics questions from NEET UG 2022.
A light ray falls on a glass surface of refractive index $\sqrt{3}$, at an angle $60^{\circ}$. The angle between the refracted and reflected rays would be:
After passing through a polariser a linearly polarised light of intensity $\mathrm{I}$ is incident on an analyser making an angle of $30^{\circ}$ with that of the polariser. The intensity of light emitted from the analyser will be :
Two transparent media $A$ and $B$ are separated by a plane boundary. The speed of light in those media are $1.5\times {10}^{8}m{s}^{-1}$ and $2.0\times {10}^{8}m{s}^{-1}$, respectively. The critical angle for a ray of light for these two media is:
In a Young's double slit experiment, a student observes $8$ fringes in a certain segment of screen when a monochromatic light of $600\mathrm{nm}$ wavelength is used. If the wavelength of light is changed to $400\mathrm{nm}$, then the number of fringes he would observe in the same region of the screen is:
If the screen is moved away from the plane of the slits in a Young's double slit experiment, then the:
An astronomical refracting telescope is being used by an observer to observe planets in normal adjustment. The focal lengths of the objective and eye piece used in the construction of the telescope are $20 \mathrm{~m}$ and $2 \mathrm{~cm}$ respectively. Consider the following statements about the telescope: (a) The distance between the objective and eye piece is $20.02 \mathrm{~m}$ (b) The magnification of the telescope is $(-) 1000$ (c) The image of the planet is erect and diminished (d) The aperture of eye piece is smaller than that of objectie The correct statements are:
A biconvex lens has radii of curvature $20\mathrm{cm}$ each. If the refractive index of the material of the lens is $1.5$, the power of the lens is:
The power of a concave lens is
During a cloudy day, a primary and a secondary rainbow may be created, then the: