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Waves and Light — Test Answers

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1
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Which letter shows where the image will be produced?

A
X
B
Z
C
W
D
Y
2
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What should Isla write in the areas marked A, B, and C?

A
A: Has a longer wavelength B: Travels at the same speed C: Has a higher frequency
B
A: Has a longer wavelength B: Can travel only through matter C: Has a higher frequency
C
A: Has a higher frequency B: Travels at the same speed C: Has a longer wavelength
D
A: Has a higher frequency B: Can travel only through matter C: Has a longer wavelength
3

Which best explains why the diagram shows refraction but not reflection?

A
It shows an incident ray.
B
It shows that angles form between the rays and the normal.
C
It shows the ray passing through the boundary.
D
It shows that the ray is changing direction.
4

Which labels belong in the areas marked X, Y, and Z?

A
X: Causes light rays to bend toward the principal axis Y: Is capable of producing images that are larger than objects Z: Causes light rays to bend away from the principal axis
B
X: Causes light rays to bend away from the principal axis Y: Is capable of producing images that are smaller than objects Z: Causes light rays to bend toward the principal axis
C
X: Causes light rays to bend toward the principal axis Y: Is capable of producing images that are smaller than objects Z: Causes light rays to bend away from the principal axis
D
X: Causes light rays to bend away from the principal axis Y: Is capable of producing images that are larger than objects Z: Causes light rays to bend toward the principal axis
5

Which labels belong in the areas marked X, Y, and Z?

A
X: ray bounces off a boundary and changes speed Y: ray changes direction Z: ray passes through a boundary and maintains constant speed
B
X: ray bounces off a boundary and maintains constant speed Y: ray changes direction Z: ray passes through a boundary and changes speed
C
X: ray bounces off a boundary and changes direction Y: ray maintains constant speed Z: ray passes through a boundary and does not change direction
D
X: ray bounces off a boundary and does not change direction Y: ray maintains constant speed Z: ray passes through a boundary and changes direction
6

Which describes Byron’s error?

A
The incident ray labeled X should continue moving in the same direction.
B
The image should be smaller than the object.
C
The image should be inverted instead of upright.
D
The incident ray labeled Y should continue moving in the same direction.
7

Which headings belong in the chart?

A
X: Convex Y: Plane
B
X: Plane Y: Convex
C
X: Concave Y: Plane
D
X: Convex Y: Concave
8

Which labels belong in the areas marked Y and Z?

A
Y: Radio Z: Gamma rays
B
Y: Gamma rays Z: Visible light
C
Y: Ultraviolet Z: Radio
D
Y: cap x -rays Z: Infrared
9

How can Jaylen correct the error in his diagram?

A
by drawing only two arrows on the left side of the diagram, with one parallel to the wave fronts and one perpendicular to the wave fronts
B
by drawing the arrows on the right side of the opening so they point outward instead of inward
C
by drawing only two arrows on the right side of the opening, with one pointing upward and the other pointing downward
D
by drawing the arrows on the left side of the diagram so they are parallel to the wave fronts instead of perpendicular
10

Which letter represents a wavelet?

A
W
B
X
C
Y
D
Z
11

What do the areas labeled X, Y, and Z represent?

A
destructive interference in which waves cancel each other out
B
destructive interference in which waves strengthen each other
C
constructive interference in which waves strengthen each other
D
constructive interference in which waves cancel each other out
12

Which headings best complete the chart?

A
A: cap x -rays B: Radio Waves
B
A: Infrared Waves B: cap x -rays
C
A: Ultraviolet Waves B: Gamma Rays
D
A: Microwaves B: Ultraviolet Waves
13

Which are characteristics of a ray when it hits a boundary and refracts, but not when it hits the boundary and reflects? Choose two correct answers.

A
changes direction
B
passes through the boundary
C
does not change direction
D
bounces off the boundary
E
does not change speed
F
changes speed
14

Which statement describes characteristics of a concave lens?

A
A concave lens converges light and curves inward.
B
A concave lens diverges light and curves inward.
C
A concave lens diverges light and curves outward.
D
A concave lens converges light and curves outward.
15

What do all electromagnetic waves have in common?

A
They have nonmoving magnetic fields.
B
They travel only through matter.
C
They have the same wavelengths.
D
They can travel at the speed of light.
16

A ray diagram shows the ray passing from medium 1 to medium 2. After passing into medium 2, the ray bends away from the normal. What does this ray diagram illustrate?

A
refraction with medium 1 less dense than medium 2
B
reflection without scattering in a medium
C
refraction with medium 1 denser than medium 2
D
reflection with scattering in a medium
17

Which statement describes characteristics of a convex lens?

A
A convex lens converges light and curves inward.
B
A convex lens diverges light and curves outward.
C
A convex lens diverges light and curves inward.
D
A convex lens converges light and curves outward.
18

Which best describes reflection and refraction?

A
In refraction, rays bounce off a boundary, and in reflection, rays pass through a boundary.
B
In both reflection and refraction, rays bounce off a boundary.
C
In both reflection and refraction, rays pass through a boundary.
D
In reflection, rays bounce off a boundary, and in refraction, rays pass through a boundary.
19

Which best describes the surface of a concave mirror?

A
It curves outward.
B
It curves inward.
C
It is textured.
D
It is flat.
20

A 12 point 0 centimeters object is 9 point 0 centimeters from a convex mirror that has a focal length of negative 4 point 5 centimeters What is the distance of the image from the mirror?

A
4 centimeters
B
negative 3 centimeters
C
3 centimeters
D
negative 4 centimeters

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