Waves Flashcards
number of waves produced by a source per unit time
frequency
cycles per second
frequency
Hertz or Hz
frequency
wavelength
distance between two successive points in phase with each other
Meter or M
wavelength
vector quantity of a wave
velocity
fill in the blanks: All EM waves are propagated with same speed equal to ——
3.0 x 10 (raise to 8) meters per second
consists of magnitude and direction
velocity
displacement travelled by the wave per unit time
velocity
Meters per second (m/s)
velocity
symbol of wavelength
lambda
fill in the blanks: All nonzero digits are ———
significant
fill in the blanks: —— between nonzero digits are significant
zeros
fill in the blanks: Zeros at the —— of a measurement are never significant
beginning
fill in the blanks: Zeros at the end of a measurement are significant if they contain a ——– ——
decimal point
fill in the blanks: A — on top of a zero makes it significant
bar
disturbance in a medium
wave
fill in the blanks: For addition and subtraction, the —- —- determine the final answer
place values
fill in the blanks: For multiplication and division, the number of ———– —— determine the final answer
significant digits
shorten expressions of very large or very small measurements
scientific notations
fill in the blanks: If the quantity is very small and you want to express it in scientific notation, the exponent is a ——– number
negative
fill in the blanks: If the quantity is very big and you want to express it in scientific notation, the exponent is a ——– number
positive
fill in the blanks: The first coefficient in a scientific notation comes ———- - — –.
between 1 and 10
What letter represents Planck’s constant?
h
What is the expression for h?
6.63 x 10 (raise to -34) J s
What does J mean?
joules
highest point in a transverse wave
crest
lowest point in a transverse wave
trough
two types of waves
mechanical
electromagnetic
fill in the blanks: Mechanical waves are further classified based on the ——— – ———.
direction of vibration
direction of vibration is perpendicular to the direction of propagation
transverse
direction of vibration is parallel to the direction of propagation
longitudinal
high density of particles in a longitudinal wave
compression
low density of particles in a longitudinal wave
rarefaction
transverse seismic waves
S waves
longitudinal seismic waves
P waves
type of transverse wave that can propagate through a vacuum (or air)
electromagnetic waves
fill in the blanks: Electromagnetic waves are further classified based on their —— ————.
varied frequencies
What does it mean when two successive points in a wave are in phase with each other?
They have the same mode of vibration or position.
They follow one another.
Refers to how fast the wave is propagated and in what direction the propagation is
velocity
fill in the blanks: Waves with —— frequencies have short ————
high, wavelengths
fill in the blanks: Waves with low frequencies have —- ————
long wavelengths
fill in the blanks: Having the same velocity, an EM wave with —- frequency has short ———- and vice versa
high, wavelength
type of an EM wave with very high frequency or ultra high frequency
radio waves
equal to 3.0 x 10 (raise to 8) m/s for EM waves
velocity
region in the EM spectrum with the longest wavelength and lowest frequency
radio wave
extraterrestrial sources of radio waves
Sun and Jupiter
EM waves easily absorbed by water molecules thus used in cooking or heating food
microwaves
EM waves sensed in the form of heat
infrared
EM wave that can be separated into its component colors
visible light
only part of the spectrum visible to the naked eye
visible light
fill in the blanks: Too much exposure to ————– rays can cause skin cancer and damage to retina
ultraviolet
EM waves that could cause cataracts with prolonged exposure
microwaves
also known as Roentgen rays
x-ray
two types of x-ray
soft x-ray
hard x-ray
region in the EM spectrum used for destroying cancer cells through radiotherapy
gamma rays
EM wave that can cause cancer and mutation
gamma ray
EM waves emitted by radioactive materials
gamma rays
What radioactive materials are present in gamma rays?
Cobalt-60
Cesium 137
True or False: No single particle or object moved the entire distance of a wave. Only the energy is being transferred in a wave.
True
property proportional to the frequency of EM waves
energy
visible light with 760 nm
red
visible light with 610 nm
orange
visible light with 590 nm
yellow
visible light with 550 nm
green
visible light with 470 nm
blue
visible light with 410 nm
violet
energy transported per unit time and per unit area
wave intensity
Watt/m (raise to 2)
wave intensity
power delivered per unit area
wave intensity
True or False: Many properties can be observed in both transverse or longitudinal waves. Some are exclusive for one type of wave only.
True
The significand, the significant digits of a number in scientific notation or a floating-point number
mantissa
