Ray Optics Test...

Magnification for spherical mirrors m is given by

Total internal reflection can take place only if light is travelling from

Total internal reflection can take place only if

Thin lens approximation for a lens is

Material A has a critical angle i_A and material B has a critical angle i_B (i_B > i_A). Which of the following statements are true?

(i) Light can be totally internally reflected when it passes from B to A.
(ii) Light can be totally internally reflected when it passes from A to B.
(iii) Critical angle for total internal reflection is i_B - i_A.
(iv) Critical angle between A and B is ^.

According to Snell’s law

Each quarter of a vessel of depth 'H' is filled with liquids of refractive indices n₁, n₂, n₃ and n₄ from the bottom. The apparent depth of the vessel, when observed normally, is

Refraction is

Directions: The following question has four choices out of which ONLY ONE is correct.

A light of wavelength 5890 falls normally on a thin air film. The minimum thickness of the film, such that the film appears dark in reflected light is

For the given lens, which of the following statements is true for rays coming from infinity?

According to Cartesian sign convention.

Monochromatic light is incident on  two slits 0.2 mm apart. If the first order bright fringe is 4.8 mm from the central bright spot on a screen located a distance of 1.5 m from the double slit, what is the wavelength of the light (in nm)?

Light rays from a point object

The dispersive power of a material of lens of focal length 20 cm is 0.08. The longitudinal chromatic aberration of the lens is

An electric bulb is suspended at a height h from the centre of a table having a surface of radius r. If the illuminance at the edge of the table is 1/8^th as that at the centre, then the height of the bulb in terms of r is 

_{The width of a single slit, if the first minimum is observed at an angle of 2^o with a light of wavelength 6980 is}

_{Light of wavelength 6500  is incident on a slit. If the first minima for red light is at 30^o, then the slit width is}

Which of the following graphs is showing the dependence of intensity of transmitted light on the angle between the polariser and the analyser?

The minimum deviation produced by a glass prism having an angle of 60^o is 30^o. If the velocity of light in vacuum is 3 x 10¹⁰ cm/s, then what is its velocity in glass?

According to the mirror equation

For a rectangular slab, refraction takes place at

Lens maker’s formula is

A ray of light from a denser medium strikes a rarer medium at an angle of incidence i. The reflected and refracted rays make an angle of 90^o with each other. The angles of reflection and refraction are r and r', respectively. The critical angle is

Optical fibre communication uses the principle of

If the separation between a screen and a source is increased by 2%, what would be the effect on the intensity?

_{A slit of width 'a' is illuminated by red light of wavelength 6500 . If the first minimum falls at θ = 30}^o_{, then the value of 'a' is}

For small angles Snell’s law becomes

If white light is used in the Newton's rings experiment, the colour observed in the reflected light is complementary to that observed in the transmitted light through the same point. This is due to : 

According to Cartesian sign convention, the heigFocal length of a mirror is given byhts measured

A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is