Sound, Light, Mirrors & Lenses

You see the reflection 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

How much larger will your classroom seem to appear if the entire two adjacent walls of your classroom consist of plane mirrors?

• 2x larger

• 3x larger

• 4x larger

• can’t be determined

Where is the image located if an 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 1.5m in front of a plane mirror?

• 1.5 m

• 2.0 m

• 3.0 m

• 4.5 m

Zed stands 1.5-m tall in front of a plane mirror. What is the height of his image?

• 4.5 m

• 3.0 m

• 2.0 m

• 1.5 m

Tags

NGSS.MS-PS4-2

A light ray, traveling 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

An object is placed between a concave mirror and its focal point. What is the type and orientation of the image formed?

• virtual and inverted

• real and inverted

• virtual and erect

• real and erect

Tags

NGSS.MS-PS4-2

What kind of mirror is used in automobiles and trucks to give the driver a wider area and smaller image of traffic behind him?

• Plane mirror

• Convex mirror

• Concave mirror

• None of the above

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

• a. Plane mirror

• b. Convex mirror

• c. Concave mirror

• d. None of the above

A white sheet of paper cannot act as mirror because it ____________ the rays of light

• diffracts

• diffuses

• interferes

• refract

Tags

NGSS.MS-PS4-2