Embibe Experts Solutions for Exercise 1: SAT 2019-20

While performing an experiment of dispersion of white light through a prism, four students represented the dispersion pattern as shown below. Identify the correct representation:

A spherical mirror and a thin spherical lens each of focal length $-10 \mathrm{cm}$ are given. The mirror and lens are likely to be:

In the following diagram ‘$M$’ is a mirror and ‘$P$’ is an object and ‘$Q$’ is the magnified image of ‘$P$’ formed by the mirror. The mirror ‘$M$’ is a:

The image formation in a convex lens is shown in the following figure.

$\mathrm{AB}$ is the object and ${\mathrm{A}}^{\text{'}}{\mathrm{B}}^{\text{'}}$  is the image. The focal length of the lens is :

The lenses of power $+ 3.5 \mathrm{D}$, $+ 2.5 \mathrm{D}$ and $+ 1 \mathrm{D}$ are placed in contact with each other in an optical device. The effective power of combination of these lenses is :

A person needs a lens of power $-4.5 \mathrm{D}$ for correction of his/her vision, then the focal length of corrective lens is.

Select the correct statement.

The magnification of image formed at a distance of $4 \mathrm{cm}$ by a needle when it is placed at a distance of $\mathrm{X} \mathrm{cm}$ away from a convex mirror of focal length $12 \mathrm{cm}$.