Chapter 3 Quiz Flashcards
1 kilohertz (kHz) is equal to:
a.) 1000 hertz
b.) 100 hertz
c.) 1000000000 hertz
d.) 1000000 hertz
a.) 1000 hertz
During a fluoroscopy procedure the tech stands at 5 meters from the xray tube for 1 hour and acquires an equivalent dose of 0.2 msv How much dose would the tech have recieved had they stood 2 meter from the tube for 20 minutes?
a.) 0.4 msv
b.) 1.25 msv
c.) 0.0208 msv
d.) 2.5 msv
a.) 0.4 msv
1.5 sec = _________ ms
1500
Electromagnetic radiation:
a.) has mass that increases with increasing velocity
b.) exits at zero velocity
c.) has energy represented by amplitude
d.) exists only if its velocity is 3x 10 ^ 8
d.) existis only if its velocity is 3x10^8
500ma @ ________ms= 70 mas
140
Radiation emitted from a standard radio broadcasting antenna:
a.) has a higher frequency than microwaves
b.) is electromagnetic radiation
c.) is sound
d.) has relatively high energy
b.) is electromagnetic radiation
If the intensity received by a patient at 40 inches is 240 mr what will the new intensity be at 48 inches?
167 mr
Energy in a stored state is:
a.) energy in motion
b.) power
c.) kinetic energy
d.) potential energy
d.) potential energy
Electromagnetic radiation has properties of a wave and a particle.
a.) true
b.) false
a.) true
Frequency is typically measured in:
a.) centimeters
b.) hertz
c.) meters
d.) feet
b.) hertz
As a waves wavelength increases, its frequency
a.) increases
b.) decreases
c.) stays the same
d.) it depends on the type of emr
b.) decreases
Wavelength is defined as:
a.) the next wave
b.) the maximum height of the wave
c.) the speed of a wave
d.) the number of waves passing a given point each second
e.) the distance between the peack of 1 wave to the peak of the next wave
e.) the distance between the peak of 1 wave to the peak of the next wave
`Electromagnetic, chemical, electrical and thermal are all types of:
a.) waves
b.) energy
c.) nonionizing radiation
d.) ionizing radiation
b.) energy
All of the electromagnetic radiations are capable of ionizing matter.
a.) true
b.) false
b.) false
Which of the following memebers of the electromagnetic spectrum has the ability to ionize matter? Choose all that apply.
a.) radiowaves
b.) xrays
c.) microwaves
d.) ultraviolet
b.) xrays
Microwaves travel at a velocity of:
3 x 10 ^8
Who developed the theory of electromagnetic radiation?
a.) wilhelm roentgen
b.) john dalton
c.) dmitri medeleev
d.) james maxwell
d.) james maxwell
Electromagnetic energy is:
a.) a form of chemical energy
b.) a form of energy that exists as stored energy inside a tube
c.) exists due to atomic and molecular motion
d.) a form of energy that exists as an electrical and magnetic disturbance in space
d.) a form of energy that exists as an electrical and magnetic disturbance in space
Amplitude is defined as:
a.) the number of waves passing a given point each second
b.) the distance between the peak of 1 wave to the peak of the next wave
c.) the speed of a wave
d.) the maximum height of a wave
d.) the maximum height of a wave
Photons with the highest frequencies have the ______.
a.) lowest energy
b.) longest wavelengths
c.) shortest wavelengths
d.) highest velocity
c.) shortest wavelengths
Which of the following memebers of the electromagnetic spectrum have the highest velocity?
a.) xrays and gamma rays
b.) radiowaves
c.) microwaves
d.) they all have equal velocity
e.) some of the above, but not all
d.) they all have equal velocity
When compared to visible light, xrays have greater:
a.) frequency
b.) velocity
c.) charge
d.) wavelength
a.) frequency
Electromagnetic energy cannot travel through a vaccuum.
a.) true
b.) false
b.) false
What is the formula that represents the inverse square law?
I1/I2 = (D2)^2/(D1)^2
In the formula E=hf, h represents
a.) frequency
b.) energy
c.) electricity
d.) plancks constant
d.) plancks constant
