The field of view is maximum for

(1) Concave mirror

(2) Convex mirror

(3) Plane mirror

(4) Parabolic concave mirror

An object is placed in front of a concave mirror. The distance of the object from the focus is 10 cm and the distance of the image from the focus is 40 cm, then the focal length mirror is :

1. 20 cm

2. 10 cm

3. 40 cm

4. 30 cm

A fish at a depth y inside the water is seeing a bird. The bird is at a height x above the water level. Refractive index of water is $\mu$, then the apparent distance of the bird as seen by the fish is :

(1) x+$\mu$y

(2) y+$\mu$x

(3) x+$\frac{y}{\mu }$

(4) y+$\frac{x}{\mu }$

A jar of height H is half-filled with a liquid of refractive index ${\mu }_1$ and the remaining half with a liquid of refractive index ${\mu }_2$. The apparent depth of a coin placed at the bottom of the jar when seen from the vertically upward direction is:

1. $\frac{{\mu }_1{\mu }_2}{({\mu }_1+{\mu }_2)}.H$

2. $\left(\frac{{\mu }_1+{\mu }_2}{{\mu }_1{\mu }_2}\right).H$

3. $\left(\frac{{\mu }_1+{\mu }_2}{2{\mu }_1{\mu }_2}\right).H$

4. $\left(\frac{{\mu }_1+{\mu }_2}{2}\right).H$

If the critical angle for a liquid A is 60$°$ and critical angle for the liquid B is 45$°$, then the critical angle for a ray traveling from A to B will be:

1. Less than 45$°$

2. More than 60$°$

3. Between 45$°$ and 60$°$

4. Does not exist

A convex lens made of 5 different transparent materials is used to make an image of an object placed in front of it. The number of images formed will be :

(1) 2 

(2) 3

(3) 4

(4) 5

If the plane surface of a planoconvex lens is silvered, then it will behave as:
1. converging mirror
2. diverging mirror
3. plane mirror
4. may behave as (1) or (2)

Chromatic aberration of a lens can be corrected by

(1) Reducing its aperture

(2) Proper polishing of its surfaces

(3) Suitable combining it with another lens

(4) Providing different suitable curvature to its surfaces

A small air bubble is at the centre of a glass sphere of radii 5 cm. When it is viewed from outside what will be the position of the image?

Refractive index of glass is 1.5

(1) At the same place as that of object

(2) $\frac{10}{3}$ cm from the surface near the eye

(3) 7.5 cm from the surface of the sphere near the eye

(4) At infinity

The refractive indices of a prism for red, yellow and violet colours are 1.52, 1.57 and 1.62 respectively, then the dispersive power of the material of prism will be:

(1) 1.57

(2) $\frac{1}{5.7}$

(3) 5.7

(4) 1