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Glossary of Physics Final Exam

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The nucleus of an atom is made up of
B. Protons and Neutrons
In a vacuum, electromagnetic radiation of short wavelengths....
B.Travels as fast as radiation of long wavelengths
Snell's law is a ratio between the sine of the angle of incidence and the sine of the angle of refraction which...
A. Remains constant for the medium
If a light ray stikes a flat mirror at an angle of 30 degrees from the normal, the ray will be reflected at an angle of
A. 60 degrees from the mirror's surface
If light waves change speed when they pass from one medium into another, the light will be...
B. Refracted
A wave will travel only as long as it has _____ to carry
A. energy
If a light ray is traveling from air into glass and meets this boundary at an angle of incidence of 36 degrees, which of the following is the angle of refraction
A. 22 degrees
An image of a distant object produced by the refraction of light through air layers of different densities is _______.
B. a mirage
The line that is perpendicular to a surface at any given point is called the
A. normal
If a light ray strikes a flat mirror at an angle of 27 degrees from the normal, the reflected ray will be
D. 27 degrees from the normal
When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror's surface, the angles of incidence and reflection are measured from the normal and
D. the angles of incidence and reflection are equal
Refraction is the term for the bending of a wave disturbance as it passes at an angle from one ________ into another.
A. medium
When a light ray passes from water (n=1.333) into diamond (n=2.419) at an angle of 45 degrees, its path is
C. bent toward the normal
Which of the following is the most likely angle of refraction for a light beam traveling from air into a glass prism stiking at an angle of 35 degrees?
A. 26 degrees
Two ducks are flying south when they encounter a large cloud. If their speed was 35 km/h before reaching the cloud and it changes to 25 km/h after entering the cloud, where are they headed?
D. south for the winter
Which is an example of refraction?
D. A fish appears closer to the surface of the water than it really is when observed from a riverbank.
If a light ray strikes a flat mirror at an angle of 14 degrees from the normal, the reflected ray will be
B. 14 degrees from the normal
Reflection of light waves from a smooth surface is
C. regular reflection
The _______ of light can change when light is refracted because the wavelength changes
A. color
Which of the following describes what will happen to a light ray incident on a glass to air boundary at greater than the critical angle?
D. total reflection
When a light ray moves from air into glass at an angle of 45 degrees, its path is...
C.Bent toward the normal
Which interaction of nature holds the planets, stars, and galaxies together, even though its effect on elementary particles is negligible?
B. Gravitational
Part of a pencil that is placed in a glass of water appears bent in relation to the part of the pencil that extends out of the water. What is this phenomenon called?
C. Refraction
The speed of electromagnetic waves is _________.
D. 300,000 km/s in a vacuum
If a light ray is traveling from glass into air and meets this boundary at an angle of incidence of 36 degrees, which of the following is the angle of refraction
B. 45 degrees
A radio wave has a speed of 3.00 x 10^8 m/s and a frequency of 107 MHz. What is the wavelength?
C. 2.79 m
Which of the following is a wave whose source is some form of repeating motion?
D. Periodic wave
What happens to the energy carried in a given time interval by a mechanical wave when the wave's amplitude is doubled?
B. It increases by a factor of four.
Which of the following is the interference that results when individual displacements on opposite sides of the equilibrium position are added together to form the resultant wave?
A. Destructive
Which of the following is the interference that results when individual displacements on the same side of the equilibrium position are added together to form the resultant wave?
B. Constructive
Tripling the displacement from equilibrium of an object in simple harmonic motion will change the magnitude of the object's maximum acceleration by what factor?
D. 3
An amusement park ride swings back and forth once every 40.0 s. What is the ride's frequency?
B. 2.50 x 10^-2 Hz
Which of the following is the time it takes to complete a cycle of motion?
A. Period
Water waves are ___________.
D. Both A and B
How many nodes and antinodes are shown in the standing wave above?
A. Five nodes and four antinodes
Wave A carries more energy than wave B. Wave B has a smaller ______ than wave A.
D. Amplitude
Two waves can occupy the same space at the same time because waves
A. are displacements of matter
The angle between the string of a pendulum at its equilibrium position and at its maximum displacement is its
A. Amplitude
In the waveform of the longitudinal wave shown above, the compressed regions correspond to
A. Crests
What happens to the energy carried in a given time interval by a mechanical wave when the wave's amplitude is halved?
A. It decreases by a factor of four.
A 2.0 m long stretched rope is fixed at both ends. Which wavelength would NOT produce standing waves on this rope?
B. 3.0 m

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