List of top Physics Questions on Images Formed By Lenses asked in CUET (UG)

The radius of curvature of the curved surface of a plano-convex lens is \(20\,\text{cm}\). If the refractive index of the material of the lens is \(1.5\), it will

Arrange the following in increasing order of focal length of a given lens. (A) \(f_V\) -- focal length for violet colour (B) \(f_B\) -- focal length for blue colour (C) \(f_Y\) -- focal length for yellow colour (D) \(f_R\) -- focal length for red colour Choose the correct answer from the options given below:

The figure below shows an equiconvex lens \((n = 1.5)\) placed in contact with a thin liquid layer resting on a plane mirror. A small needle, with its tip positioned on the principal axis of the lens, is moved along the axis until its inverted image coincides with the needle tip itself. When the liquid is present, the distance between the needle and the lens is found to be \(50\,\text{cm}\). The experiment is then repeated after removing the liquid, and the distance is observed to be \(35\,\text{cm}\). The refractive index of the liquid is

The focal length of a convex lens is $20\text{ cm}$. An object is placed at $40\text{ cm}$ from the lens. The image formed will be:

Two identical symmetric double convex lenses of focal length \(f\) are cut into two equal parts \(L_1, L_2\) by \(AB\) plane and \(L_3, L_4\) by \(XY\) plane as shown in figure respectively. The ratio of focal lengths of lenses \(L_1\) and \(L_3\) is graphics[width=0.5\linewidth]{Q10.png}

In an experiment with a convex lens, the length of an image is 1 cm, and the object length is 5 cm. If the object is placed at a distance of 40 cm from the lens, then the focal length of the lens is

Which of the following statement(s) is/are correct?
(A) The power of a lens is the ability of the lens to converge or diverge the incident rays.
(B) S.I unit of the power of a lens is dioptre while focal length is in centimetres
(C) For a lens of larger focal length, power is smaller
(D) In any combination of lenses, the power of combination is not algebraic addition of power of combined lenses
Choose the correct answer from the options given below:

If focal length of a concave lens is 50 cm, then the power of the lens would be

The graph shows the variation of the magnification (m) produced by a thin lens with image distance (v). The focal length of the lens is: