Optics Quiz

You see the refection of the clock without numbers in your plane mirror. The image formed by the hands of the clock shows the time of 3:30. What is the real time?

• 3:30

• 8:30

• 9:30

• 10:30

Where is the image located if a 2 cm object is 30 cm in front of convex mirror with a focal length of 20 cm?

• Between F and V

• Between C and F

• in front of the mirror

• can't be determined

What is the distance of your image from you if you stand 1.5 m in front of a plane mirror?

• 1.5 m

• 2.0 m

• 3.0 m

• 4.5 m

If you stand in front of two adjacent large mirrors at 90 degrees angle, how many images will you see?

• 1

• 2

• 3

• 4

What kind of mirror is used by department stores to give wider area and smaller image of the shoppers/buyers?

• plane mirror

• convex mirror

• concave mirror

• none of these

What type of lens produces smaller and upright images?

• concave lens

• convex lens

• converging lens

• can't be determined

What type of mirror do dentists usually use to clearly see the images of our teeth?

• plane mirror

• convex mirror

• concave mirror

• none of these

A light ray, travelling parallel to a concave mirror's axis, strikes the mirror's surface. The reflected ray _________.

• passes through the mirror's focal point.

• again travels parallel to the mirror's axis.

• travels at right angles to the mirror's axis.

• passes through the mirror's center of curvature.

When a small object is placed on the principal axis of a concave mirror between the focus and the mirror, the image formed is ____.

• erect, magnified and virtual.

• inverted, magnified and real.

• inverted, reduced and real.

• erect, reduced and real.

A light ray traveling obliquely to a convex mirror's axis, goes directly to the mirror's center of curvature before striking the mirror's surface. What is the direction of the reflected ray after hitting the mirror?

• it travels parallel to the mirror's axis.

• it passes through the mirror's focal point.

• it travels at right angles to the mirror's axis.

• it travels back through the mirror's center of curvature.