Mirrors Flashcards
Describe diffuse reflection.
It is best identified as a reflection from a surface with irregularities or is opaque causing an imperfect reflection.
When a ___ of light strikes the surface of a mirror, the rays will continue to diverge after reflection.
Pencil
What type of mirror will cause images to appear magnified?
Concave
What type of mirror will cause images to appear closer than they are?
Convex
What type of mirror produces a reflection with a ghost image?
Second surface mirror
What does the law of reflection state?
The angle of incidence is equal to the angle of reflection.
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
2.) the object appears closer than it is in front of the mirror
What acts in the same way as a ray of light when it is reflected?
Beam
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
True
Reflection produced as a result of a smooth/polished surface is called what?
Specular reflection
What is a benefit of first surface mirrors?
Elimination of ghost images
What is a benefit of second surface mirrors?
Cost
Which of the following primarily use front surface mirrors? Curved/theatrical mirrors, make-up mirrors, telescopes, or rear view mirrors
Telescopes
What is the reflection that gives a critically cut diamond maximum sparkle?
Total internal reflection
What is the usual degree for critical angle?
42 degrees
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
c.) The light travels from the single object to the mirror, and then to the respective observers
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.
True
Unless interrupted, how does a single ray of light travel?
In a straight line
If light falls on a surface with irregularities or is opaque, what will happen?
It will still be reflected back but it will do so in a random manner, not creating a perfect reflection
If a surface is smooth or polished, what is the reflection that comes off of that surface referred to as?
Specular reflection
What is the formula used for calculating focal length?
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
