List of top Physics Questions on Ray optics and optical instruments asked in JKCET

Multimode graded index fibers are manufactured from materials with ______.
A quartz prism can produce a minimum deviation $ \delta $ in a light beam. Then the minimum deviation produced by three prisms combined together is
What is lateral shift with respect to optics ?
Focal length, radius of curvature and power of a plane mirror respectively are
Dispersion without deviation is produced by two thin (small angled) prisms which are combined together. One prism has angle $ 5^{\circ} $ and refractive index $ 1.56 $ . If the other prism has refractive index $ 1.7 $ , what is its angle ?
Due to atmospheric refraction effects, the day becomes longer by
A converging lens has a focal length of $ 0.12\, m $ . To get an image of unit magnification the object should be placed at what distance from the converging lens?
For a thin lens with radii of curvatures and $ R_{1} $ and $ R_{2} $ , refractive index $ n $ and focal length $ f $ , the factor $ \left(\frac{1}{R_{1}}-\frac{1}{R_{2}}\right) $ is equal to
For an object placed in front of a convex mirror of focal length $ f $ , its image is formed
Consider a ray of light travelling from a denser to a rarer medium. If it is incident at the critical angle then
Consider a bi-convex lens and a plano-convex lens, with radii of curvature of all the curved surfaces being same. If $f$ is the focal length of bi-convex lens then, the focal length of the plano-convex lens is
A parallel narrow-beam of light is falling normally on a glass sphere. It will come to a focus
Which of the following relation is called mirror equation?
Light from a point source in air falls on a spherical glass surface ( $ n=1.67 $ and radius of curvature $ =25\,cm $ ). The distance of the light source from the glass surface is $ 95\,cm $ . At what position, the image is formed?
A concave mirror of focal length $f$ produces a real image $n$ times the size of the object. The distance of the object from the mirror is
A compound microscope has a magnification of $ 30 $ . The focal length of the eye-piece is $ 5\,cm $ If the final image is formed at the least distance of distinct vision $ (25\,\,cm) $ the magnification produced by the objective is
When an object is placed $40\,cm $ from a diverging lens, its virtual image is formed $20\,cm$ from the lens. The focal length and power of lens are
A magnifying glass of focal length $ 5\,cm $ is used to view an object by a person whose smallest distance of distinct vision is $ 25\,cm $ . If he holds the glass close to eye, the magnification is
Which of the following optical phenomena is involved in the propagation of light in an optical fibre?
Rainbow is a phenomenon due to
A microscope is focussed on an ink mark on the top of a table. lf we place a glass slab of 3 cm thick on it, how should the microscope be moved to focus the ink spot again? The refractive index of glass is 1.5
Which one of the following is not associated with the total internal reflection?
Maximum lateral displacement of a ray of light incident on a slab of thickness $t$ is