JEE 2020 Physics: Ray Optics Quiz 1 (18.09.2019) for JEE & BITSAT Exams

Question 1

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

Question 2

When a plane mirror AB is placed horizontally on level ground at a distance of 60 metres from the foot of a tower, the top of the tower and its image in the mirror subtends, an angle of 90° at B. The height of the tower is :

Question 3

Figure shows a cubical room ABCD with the wall CD as a plane mirror. Each side of the room is 3m. We place a camera at the mid-point of the wall AB. At what distance should the camera be focussed to photograph an object placed at A -

Question 4

The circular boundary of the concave mirror subtends a cone of half angle θ at its centre of curvature. The minimum value of θ for which ray incident on this mirror parallel to the principle axis suffers reflection more than one is –

Question 5

A person’s eye level is 1.5 m. He stands in front of 0.3 m long plane mirror which is 0.8m above the ground. The length of the image he sees of himself is –

Question 6

Two spherical mirrors, one convex and the other concave, each of same radius of curvature R are arranged coaxially at a distance of 2R from each other. A small circle of radius a is drawn on the convex mirror as shown in figure. What is the radii of first two images of the circle ?

Question 7

In the figure shown consider the first reflection at the plane mirror and second at the convex mirror. AB is object and AB is moving.

Question 8

Two plane mirrors are parallel to each other and spaced 20 cm apart. An object is kept in between them at 15 cm from A. Out of the following at which point (s) image (s) is/are not formed in mirror A (distance measured from mirror A) –

Question 9

A particle is moving towards a fixed spherical mirror. The image.

Question 10

A point object on the principal axis at a distance 15 cm in front of a concave mirror of radius of curvature 20 cm has velocity 2mm/s perpendicular to the principal axis. The velocity of image at that instant will be: