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IMPORTANT
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What is the position and nature of image formed by lens combination shown in figure? ( are focal lengths)
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Important Questions on Ray Optics
MEDIUM
JEE Main
IMPORTANT
A plano - convex lens (focal length , refractive index radius of curvature R) fits exactly into a plano - concave lens (focal length refractive index radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be:
EASY
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Formation of real image using a biconvex lens is shown below:
If the whole set up is immersed in water without disturbing the object and the screen positions, what will one observe on the screen?
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JEE Main
IMPORTANT
A plano-convex lens becomes an optical system of focal length when its plane surface is silvered and illuminated from left to right as shown in fig If the same lens is instead silvered on the curved surface and illuminated from another side as in fig-, it acts as an optical system of focal length . The refractive index of the material of the lens is:
MEDIUM
JEE Main
IMPORTANT
A particle is oscillating on the -axis with an amplitude about the point with a frequency. A concave mirror of focal length is placed at the origin (see figure).
Identify the correct statements?
(i) The image executes periodic motion.
(ii) The image executes non-periodic motion.
(iii) The turning points of the image are asymmetric with respect to the image of the point at .
(iv) The distance between the turning points of the oscillation of the image is .
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JEE Main
IMPORTANT
A ray of light is incident at an angle of on one face of a prism of angle . The emergent ray of light makes an angle of with incident ray. The angle made by the emergent ray with second face of prism will be:
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JEE Main
IMPORTANT
A diverging lens with magnitude of focal length is placed at a distance of from a converging lens of magnitude of focal length . A beam of parallel light falls on the diverging lens. The final image formed is:
MEDIUM
JEE Main
IMPORTANT
Let the refractive index of a denser medium with respect to rarer medium be and its critical angle be . At an angle of incidence when light is travelling from denser medium to rarer medium, a part of the light is reflected and the rest is refracted and the angle between reflected and refracted rays is . Angle is given by
MEDIUM
JEE Main
IMPORTANT
In an experiment a convex lens of focal length is placed coaxially on an optical bench in front of a convex mirror at a distance of from it. It is found that an object and its image coincide, if the object is placed at a distance of from the lens. The focal length of the convex mirror is-
