Mirrors

Question 1

Describe diffuse reflection.

Answer 1

It is best identified as a reflection from a surface with irregularities or is opaque causing an imperfect reflection.

Question 1

When a ___ of light strikes the surface of a mirror, the rays will continue to diverge after reflection.

Answer 1

Pencil

Question 2

What type of mirror will cause images to appear magnified?

Answer 2

Concave

Question 3

What type of mirror will cause images to appear closer than they are?

Answer 3

Convex

Question 4

What type of mirror produces a reflection with a ghost image?

Answer 4

Second surface mirror

Question 5

What does the law of reflection state?

Answer 5

The angle of incidence is equal to the angle of reflection.

Question 6

When viewing a reflection of an object in a plane mirror, which of the following statements is false?
1.) The object appears the same distance behind the mirror as the object is in front of the mirror
2.) the object appears closer than it is in front of the mirror
3.) the object appears upright
4.) the object appears the same general size

Answer 6

2.) the object appears closer than it is in front of the mirror

Question 7

What acts in the same way as a ray of light when it is reflected?

Answer 7

Beam

Question 8

True or false: As long as the normal can be drawn at the point of incidence, the angle of incidence can be measured and the direction of the reflected ray can be determined

Answer 8

True

Question 9

Reflection produced as a result of a smooth/polished surface is called what?

Answer 9

Specular reflection

Question 10

What is a benefit of first surface mirrors?

Answer 10

Elimination of ghost images

Question 11

What is a benefit of second surface mirrors?

Answer 11

Cost

Question 12

Which of the following primarily use front surface mirrors? Curved/theatrical mirrors, make-up mirrors, telescopes, or rear view mirrors

Answer 12

Telescopes

Question 13

What is the reflection that gives a critically cut diamond maximum sparkle?

Answer 13

Total internal reflection

Question 14

What is the usual degree for critical angle?

Answer 14

42 degrees

Question 15

When an object is placed in front of a mirror, two different observers appear to see an image of the object in different places. Based on the previous sentence, which of the following statements is true?
a.) The light does not travel from the single object to the mirror and then to the respective observers
b.) The light travels from the single object to the mirror, inverts, and then to the respective observers
c.) The light travels from the single object to the mirror, and then to the respective observers
d.) The light does not travel from the single object to the mirror, inverts, and then to the respective observers

Answer 15

c.) The light travels from the single object to the mirror, and then to the respective observers

Question 16

True or false: when viewing a reflection of an object in a plane mirror, the object appears the same distance behind the mirror as the object is in front of the mirror.

Answer 16

True

Question 17

Unless interrupted, how does a single ray of light travel?

Answer 17

In a straight line

Question 18

If light falls on a surface with irregularities or is opaque, what will happen?

Answer 18

It will still be reflected back but it will do so in a random manner, not creating a perfect reflection

Question 19

If a surface is smooth or polished, what is the reflection that comes off of that surface referred to as?

Answer 19

Specular reflection

Question 20

What is the formula used for calculating focal length?

Answer 20

1/di + 1/do = 1/f, where di is the distance to the mirror from the image, do is the distance to the mirror from the object, and f is the focal length of the mirror