Question 1

It is not possible to see a virtual image, since the rays that seem to emanate from a virtual image do not in fact emanate from the image.

Group of answer choices

True

False

Flag question: Question 2

A light beam has speed c in vacuum and speed v in a certain plastic. The index of refraction n of this plastic is

A) n = cv.

B) n = c/v.

C) n = v/c.

D) n = (c/v)².

E) n = (v/c)².

Group of answer choices

D

B

A

C

E

Flag question: Question 3

Light enters air from water. The angle of refraction will be

A) less than the angle of incidence.

B) equal to the angle of incidence.

C) greater than the angle of incidence.

D) undefined in such case.

Group of answer choices

B

A

D

C

Flag question: Question 4

Light enters glass from air. The angle of refraction will beless than the angle of incidence.

Group of answer choices

True

False

Flag question: Question 5

A beam of light traveling in air strikes a glass slab at an angle of incidence less than 90. After entering the glass slab, what does the beam of light do?

A) It slows down.

B) It bends away from the normal at the point of contact.

D) It follows the same path as before it struck the glass.

E) It follows the normal to the glass slab.

Group of answer choices

B

C

D

A

Flag question: Question 6

The image formed in a plane mirror isat the same distance behind the mirror as the object is in front of the mirror.

Group of answer choices

True

False

Flag question: Question 7

An object is placed in front of a convex mirror at a distance larger than twice the magnitude of the focal length of the mirror. The image will appear

A) in front of the mirror.

B) upright and enlarged.

C) upright and reduced.

D) inverted and reduced.

E) inverted and enlarged.

Group of answer choices

D

A

B

C

Flag question: Question 8

You may have seen ambulances on the street with the letters of the word AMBULANCE written on the front of them, in such a way as to appear correctly when viewed in your car's rear-view mirror. (See the figure.) How do the letters appear when you look directly at the ambulance (not through the mirror)?

Group of answer choices

C

B

E

D

A

Flag question: Question 9

A convex lens has focal length f. If an object is located at "infinity" (very far away), the image formed is located at a distance from the lensof infinity.

Group of answer choices

True

False

Flag question: Question 10

The image formed by a single concave lens

A) could be real or virtual, but is always real when the object is placed at the focal point.

B) is always real.

C) is always virtual.

D) is always inverted.

E) could be real or virtual, depending on whether the object distance is smaller or greater than the focal length.

Group of answer choices

D

B

C

E

A