Exam over Optics
When light rays strike a surface they bounce off and
this process is called __________________.

reflection

refraction

diffraction

interference
Angle 2 is the angle of _________.

incidence
If a light ray strikes a mirror at 75 degrees, at what
angle will it reflect back?

reflection

refraction

25 degrees

diffraction

15 degrees

75 degrees

90 degrees
Ray 3 is the ____________ ray.
Ray 1 is the ______ ray

reflected

incident

refracted

diffracted

incident

refracted

diffracted

reflected
Reflected light on a convex surface all meet at a
_______ in front of the object.
Angle 4 is the angle of ___________.

incidence

reflection

refraction

diffraction
Mirror surfaces of aluminum and silver reflect about
___________ of the light that strikes them.

90%

80%

reflective angle

focus point

focal point

refractive angle
Find the focal length of a concave mirror with a
radius of curvature of 90 cm. (f=1/2 r)

180 cm

90 cm

55 cm

45 cm
When light strikes a different kind of surface such as

70%

60%
water, some of the light is reflected and some is
allowed to pass through and it changes
direction. This change in direction is called
___________________.
_______ mirrors provide wide-angle views for
security but also make objects appear farther away
than they really are.

refraction

reflection

Convex

interference

Concave

diffraction

Refractive

Reflective
The _________is a property of a transparent
material defined as the ratio of the speed of light in
a vacuum to the speed of light in the material.


index of refraction
index of reflection

index of interference

index of diffraction
The speed of light in Diet Cherry Vanilla Dr. Pepper is
A ____________________ lens is thinner at the
center than at its edges.

concave

convex

constructive

destructive
__________________ occurs when light bends
around the edge of an obstacle.
263,234,639 m/s. What is the index of refraction if
the speed of light is 300,000,000 m/s? [Index of

Reflection
refraction = speed of light / speed of light in
material (n = c / v)]

Refraction

Diffraction

Interference

36,765,361 m/s

0.877 m/s

1.14 m/s
The_______ principle says that the amplitude of a

563,234,639 m/s
wave is the sum of the amplitudes of both waves
when they meet in interference.
A ___ lens is thicker at the center than it is at the
edges.

concave

convex

constructive

destructive

physical optics

superposition

reflection

Snell's
Waves that are not in phase, have a cancellation of
the amplitudes called _______ interference.

Total Internal Reflection
How does light normally travel?

constructive

destructive

In a straight line

diffractive

In concentric circles

internal

In a curved line
If the amplitude of wave 1 is 84.23 and the
amplitude of wave 2 is 12.43, what is the total
amplitude if the waves are in phase?


Snell's Law

Law of Reflection

Total Internal Reflection

Law of Refraction
6.78 m

78.1 m

71.8 m

____________ says as the angle of the incident
increases, the angle of refracted ray increases also.
96.66 m
A light ray reflects from the surface of an object at
When the angle of refraction is greater than 90°,
light is reflected not refracted. This is known as
_____.

Snell's Law

Law of Reflection

Total Internal Reflection


ray

angle

beam

intensity
Law of Refraction
The angle of incidence is equal to the angle of
reflection and this is called the _________.

the same _____________ at which it strikes the
object.
Snell's Law

Law of Reflection

Law of Incidence
___________________ occurs when light from one
source mixes with light from another source.

Refraction

Diffraction

Interference