Physics Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.

When a ray of light enters a glass slab, then

The light-gathering power of a camera lens depends on

Rainbow is formed by _______ of light by droplets of water.

In the propagation of electromagnetic waves, the angle between the direction of propagation and plane of polarisation is

In the propagation of light waves, the angle between the plane of vibration and plane of polarisation is

Polaroid glass is used in sunglasses because

Light transmitted by Nicol prism is

Light waves can be polarised because they

The angular magnification of a simple microscope can be increased by increasing

When ordinary light is made incident on a quarter-wave plate, the emergent light is

Two light waves from S1 and S2 on reaching points P and Q on a screen in young’s double slit experiment have a path, difference zero and λ /4 respectively. The ratio of light intensities at P and Q will be

Which colour of light has the highest speed

The condition for observing Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be

Dispersion of light is caused due to

In which of the following the final image is erect?

To increase the angular magnification of a simple microscope, one should increase

The image formed by an objective of a compound microscope is

The focal length of a normal eye-lens is about

Astigmatism is corrected using

In secondary rainbow what is the order of colours observed from earth?

A point source of light is placed 4 m below the surface of water of refractive index 5/3. The minimum diameter of a disc which should be placed over the source, on the surface of water to cut-off all light coming out of water is

In primary rainbow what is the order of colors observed from earth?

The angle of prism is 60° and angle of deviation is 30°. In the position of minimum deviation, the values of angle of incidence and angle of emergence are:

The dispersive power of a prism depends on its

Yellow light is refracted through a prism producing minimum deviation. If i1 and i2 denote the angle of incidence and emergence for this prism, then

When white light enters a prism, it gets split into its constituent colours, This is due to

If D is the deviation of a normally falling light beam on a thin prism of angle A and δ is the dispersive power of the same prism then

If a glass prism is dipped in water, its dispersive power

A pencil of light rays falls on a plane mirror and forms a real image, so the incident rays are

The focal length of a converging lens are fv and fR for violet and red light respectively. Then

What causes chromatic aberration?

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

Time image formed by an objective of a compound microscope is

The speed of light in an isotropic medium depends on

The apparent flattening of the sun at sunset and sunrise is due

Which of the following is used in optical fibres?

When the angle of incidence of a light ray is greater than the critical angle it gets

The difference between reflection and total internal reflection is that

If the light moving in a straight line bends but a small in fixed angle, it may be a case of

When a ray of light enters a glass slab from air

The following figure shows refraction of light at the interface of three media


Correct the order of optical density (d) of the media is

Refraction of light from air to glass and from air to water is shown in figure (i) and figure (ii) below. The value of the angle – in the case of refraction as shown

Figures shows two rays A and B being reflected by a mirror and going as A and B. The mirror

Match the column – I and column – II:


a) (A) → (3); (B) →(1); (C) → (2); (D) →(4)
b) (A) → (4); (B)→ (3); (C) →(2); (D) → (1)
c) (A) →(1); (B) → (2); (C) → (3); (D) → (4)
d) (A) → (3); (B)→ (4); (C) → (1); (D) → (2)

Match the column – I and column – II:

a) (A) → (3); (B) → (1); (C) → (2); (D) → (4)
b) (A) → (2); (B) → (3); (C) → (4); (D) → (1)
c) (A) → (2); (B) → (4); (C) → (3); (D) → (1)
d) (A) → (3); (B) → (2); (C) → (1); (D) → (4)

Match the column – I and column – II:

Column I	Column - II
A) An object is placed at focus before a convex mirror	Magnification is -oo
B) An object is placed at centre of curvature before a concave mirror	Magnification is 0.5
C) An object is placed at focus before a concave mirror	Magnification is +1
D) An object is placed at centre of curvature before a convex mirror	Magnification is 0.33

a) (A) → (2); (B) → (3); (C) → (4); (D) → (1)
b) (A) → (2); (B) → (4); (C) → (3); (D) → (1)
c) (A) → (2); (B) → (4); (C) → (1); (D) → (3)
d) (A) → (3); (B) → (1); (C) → (2); (D) → (4)