AnswersPhysicsWaves and Light

Practice Test Answers

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1
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What do the areas labeled X and Y represent?

A
constructive interference in which waves strengthen each other
B
destructive interference in which waves cancel each other out
C
constructive interference in which waves cancel each other out
D
destructive interference in which waves strengthen each other
2
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Which labels belong in the areas marked X, Y, and Z?

A
X: Image is always virtual Y: Curves outward Z: Image may be smaller than object
B
X: Curves outward Y: Image may be smaller than object Z: Image is always virtual
C
X: Curves inward Y: Image may be larger than object Z: Image is always real
D
X: Image is always real Y: Curves inward Z: Image may be smaller than object
3

Which idea does Arnold need to correct?

A
In specular reflection, reflected rays move in the same direction.
B
In scattering, long wavelengths are scattered the most.
C
In scattering, light strikes particles in the atmosphere.
D
In diffuse reflection, reflected rays move in different directions.
4

Which letter represents the position of the object?

A
W
B
X
C
Y
D
Z
5

Yellow light has a frequency of 5 point 2 times 10 to the 14th power Hz and travels at a speed of 3.0 meters meters per second What is the wavelength of yellow light, in meters?

A
1 point 7 times 10 to the 6th power m
B
2 point 2 times 10 to the negative 6 power m
C
8 point 2 times 10 to the 22th power m
D
5 point 8 times 10 to the negative 7 power m
6

What does the index of refraction directly measure?

A
the reflection of light in a medium
B
the angle between the refracted ray and the normal line
C
the bending of light in a medium
D
the angle between the incident ray and the normal line
7

Which lists the waves in order of wavelength, from longest to shortest?

A
cap x -rays, infrared, radio waves
B
infrared, visible light, gamma rays
C
radio waves, gamma rays, visible light
D
ultraviolet, microwaves, visible light
8

Which accurately explains concave and convex lenses?

A
With convex lenses, placement of the object does not dictate which side of the lense the image will appear, but with concave lenses, they do.
B
With both concave and convex lenses, placement of the object dictates which side of the lense the image will appear.
C
With both concave and convex lenses, placement of the object does not dictate which side of the lense the image will appear.
D
With concave lenses, placement of the object does not dictate which side of the lense the image will appear, but with convex lenses, they do.
9

Which best describes Sawyer’s error?

A
The wave fronts should be both parallel and perpendicular to the direction in which the waves move.
B
The arrow showing the direction of movement of the waves should be pointing to the left.
C
The arrow showing the direction of movement of the waves should be pointing downward.
D
The wave fronts should be perpendicular to the direction in which the waves move.
10

Which letter represents the location of the image produced by the lens?

A
W
B
X
C
Y
D
Z

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