Physics Quiz: Geometrical Optics 1 for JEE & BITSAT Exams

Question 1

A particle moves towards a concave mirror of focal length 30 cm along its axis and with a constant speed of 4 cm/ sec. What is the speed of its image when the particle is at 90 cm from the mirror?

Question 2

A soldier directs a laser beam on an enemy by reflecting the beam from a mirror. If the mirror is rotated by an angle q, by what angle will the reflected beam rotate?

Question 3

The image formed by a convex mirror of a real object is

Question 4

A short linear object of length l lies along the axis of a concave mirror of focal length f at a distance u from the pole. What is the size of the image?

Question 5

A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

Question 6

A point source of light is placed in front of a plane mirror.

Question 7

In image formation from spherical mirrors, only paraxial rays are considered because they

Question 8

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30cm. The image will form at

Question 9

Figure shows tow rays A and B being reflected by a mirror and going as A’ and B’. The mirror

Question 10

The image formed by a concave mirror

Question 11

Which of the following (referred to a spherical mirror) does depend on whether the rays are paraxial or not ?

Question 12

A thin rod of

length is kept along the axis of a concave mirror of

focal length such that its image is real and magnified and one end touches the rod. Its magnification will be

Question 13

A convergent beam of light is incident on a convex mirror so as to converge to a distance 12 cm from the pole of the mirror. An inverted image of the same size is formed coincident with the virtual object. What is the focal length of the mirror

Question 14

A point object is placed mid-way between two plane mirrors distance 'a' apart. The plane mirror forms an infinite number of images due to multiple reflection. The distance between the nth order image formed in the two mirrors is

Question 15

Assuming first reflection on convex mirror, find the position of an object (O), after two reflections.