Waves and energy transfer
Terms in this set (86)
A wave is a ____________that transmits energy
Which of the following is examples of energy transmission by waves?
sound, ripples on a pond, and light
Which of the following waves have more energy?
Which of the following does not represent a mechanical wave?
Light travels as a _________ wave
There are __________ basic wave forms
During wave motion, the motion of particles to one side of the rest position will be _________ the motion to the other side of the rest position.
the same as
A transverse wave is characterized by _____.
peaks and dips
A longitudinal wave is characterized by _____.
compressions and rarefactions
Ocean waves are examples of:
True or false: Longitudinal waves cannot travel through gases or liquids.
particles move perpendicular to wave motion
particles move both perpendicular and parallel to wave motion
particles move parallel to wave motion
All waves consist of a continuous series of _____.
Waves will have the highest speed in _____.
air at 30 degrees C
What is the formula you use to calculate speed?
Where does wave reflection occur?
at boundaries between two different media
The line that is drawn perpendicular to the point at which a wave intersects a boundary is known as the _____.
The direction of motion for a series of wave fronts is represented with a(n) _____.
According to the principle of superposition, when two waves meet, they _____.
Which kind of waves are sound vibrations made of?
Sound waves have two parts. The part of the wave where the particles of the medium are pushed together is called the _____.
Through which substance will sound travel fastest?
What formula do you measure temperature with?
Vt (The speed at the temperature "T")
Which part of the ear carries sound messages to the brain?
One of the leading causes of permanent damage leading to hearing impairment is _____.
loud noise that damages hair cells
The sound waves used for sonar are _____.
True or False: The threshold of hearing for humans is 30 decibels.
A ship's foghorn will probably have a _____.
A policeman's whistle has a _____.
True or False: Pitch describes the loudness of a sound.
At close range, a ship's foghorn or the air horn on a truck will probably have a decibel reading.
A loud explosion will produce _____.
a high-amplitude sound wave
True or False: If the wavelength of a sound increases, the frequency of that sound also increases.
A sound-producing object is moving toward an observer. The sound the observer hears will have a frequency_____ that actually being produced by the object.
Which of the following is not an application of Doppler technology?
ultrasound imaging of the liver
The speed of an object traveling below the speed of sound is called _____.
A sonic boom is caused by _____.
a sound-producing object overtaking its own sound waves
What is the formula for finding the wavelength, frequency, and pitch?
velocity=distance times frequency
How do you know which sound has a higher pitch?
Whatever sound has a shorter wavelength, will have a higher pitch
What can you conclude from sound?
For any given medium, low notes have longer wavelength than high notes
What is the formula of the doppler effect when sound is moving toward observer?
f =(V sound/V sound -V source) F source
What is the formula of the doppler effect when sound is moving away from observer?
f =(V sound/V sound + V source) F source
What is the formula of the doppler effect when there is no motion between the source and observer?
f = (V sound /frequency)
Which of the following is a supersonic speed?
What type of interference results in beats?
Two tuning forks are played at the same time. One has a frequency of 176 Hz and the other is 178 Hz. How many beats per second are heard?
When two notes are played simultaneously, creating a harmonic sound, it is called _____.
When a 440-Hz tuning fork and a piano key are struck together, five beats are heard. If the pitch of the note on the piano is higher than the tuning fork, what is the frequency of the note?
435 or 445 Hz
An opera singer sings a note that breaks a glass. This is an example of _____.
In general, the______ the string or air column of a musical instrument is, the more harmonics are generated.
If the fundamental frequency of a certain string is 84 Hz, what is the frequency of the second harmonic?
One of the main contributors to the timbre of a sound is _____.
What do you do when you are calculating beats?
what is the formula for work?
w = f times d
The scientist who used a prism to study light was _____.
The color that is refracted the most has the______ wavelength.
The first estimation of the speed of light was based on observing _____.
the moons of Jupiter
The symbol used to denote the speed of light in a vacuum is _____.
True or False: The speed of light in a vacuum is 3 x 108 miles/hour.
The portion of the electromagnetic spectrum that plays a role in the activation of Vitamin D is _____.
True or False: All objects in the universe radiate some form of energy.
What is the formula for calculating the speed of light?
c = d/t or c = frequency times force
Which of the following is a luminous object?
Which of the following is an illuminated object?
What happens to light when it changes speed?
True or False: Nearly all the light that strikes an opaque object will pass through and cast a shadow.
Light bounces off the surface of an object in a process called _____.
The part of the eye responsible for fine-tuning the refraction of incoming light is the _____.
A single polarizer will stop _____ of the incoming light.
The atoms of a certain material can absorb red and blue light frequencies. What happens to yellow light that shines on it?
It is absorbed
True or False: An opaque material absorbs some light frequencies that shine on it and reflects others.
White light is shining on a red apple. The apple _____.
reflects red light
White light shines on a piece of paper whose atoms are capable of absorbing orange, indigo, violet, yellow, red, and blue light. What color is the paper?
Images produced by a flat mirror are _____.
virtual, upright, and real
True or False: Telescopes are examples of concave mirrors.
The focal length is the distance from the midline of the lens to the _____.
A_____ lens is used in a telescope.
A magnifying glass is a_______lens that forms a______ image.
convex and virtual
Nearsightedness is corrected with______lenses.
The object distance for a concave lens is 2.0 cm, and the image distance is 8.0 cm. The height of the object is 1.0 cm. What is the height of the image?
The images formed by diverging (concave) lenses are always _____.
virtual and upright
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