H C Verma Solutions for Chapter: Geometrical Optics, Exercise 2: OBJECTIVE I

A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side on its principal axis, the intensity of the light

A symmetric double convex lens is cut into two equal parts by a plane perpendicular to the principal axis. If the power of the original lens was $4 \mathrm{D}$, the power of a cut lens will be

A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was $4 \mathrm{D}$, the power of a divided lens will be

Two concave lenses ${\mathrm{L}}_1$ and ${\mathrm{L}}_2$ are kept in contact with each other. If the space between the two lenses is filled with a material of smaller refractive index, the magnitude of the focal length of the combination

A thin lens is made with a material having refractive index $\mathrm{\mu }=1.5.$ Both the sides are convex. It is dipped in water $(\mathrm{\mu }=1.33).$ It will behave like

A convex lens is made of a material having refractive index $1.2.$ Both the surfaces of the lens are convex. If it is dipped into water $(\mathrm{\mu }=1.33),$ it will behave like

A point object $\mathrm{O}$ is placed on the principal axis of a convex lens of focal length $f=20 \mathrm{cm}$ at a distance of $40 \mathrm{cm}$ to the left of it. The diameter of the lens is $10 \mathrm{cm}$. An eye is placed $60 \mathrm{cm}$ to right of the lens and a distance $h$ below the principal axis. The maximum value of $h$ to see the image is 

The rays of different colours fail to converge at a point after going through a converging lens. This defect is called