RAD-202 • Chapter 3 Quiz

Electromagnetic theory was developed in the late 1800s by:

a. Bohr

b. Rutherford

c. Maxwell

d. Planck

c. Maxwell

Electromagnetic radiation causes both __________ & __________ disturbances.

a. mechanical; heat

b. electrical; mechanical

c. magnetic; electrical

d. mechanical; visual

c. magnetic; electrical

Which of the following is not part of the electromagnetic spectrum?

a. visible light

b. microwaves

c. sound

d. gamma rays

c. sound

Which of the following electromagnetic radiation have the lowest energy level?

a. x-rays

b. visible light

c. microwaves

d. radio waves

d. radio waves

In the formula E=hf, E represents:

a. Planck's constant

b. frequency

c. energy

d. electricity

c. energy

When considering the wave properties of electromagnetic radiation, the distance from the peak of one wave to the next is:

a. wavelength

b. amplitude

c. frequency

d. velocity

a. wavelength

When considering the wave properties of electromagnetic radiation, the maximum height of a wave is:

a. wavelength

b. amplitude

c. frequency

d. velocity

b. amplitude

When considering the wave properties of electromagnetic radiation, the number of waves that pass by a given point per second is:

a. wavelength

b. amplitude

c. frequency

d. velocity

c. frequency

Wavelength is generally measured in:

a. hertz

b. feet

c. centimeters

d. meters

d. meters

1 megahertz (1 MHz) is equal to __________ hertz.

1,000,000

The inverse square law relates the intensity (of light/x-rays) to:

a. velocity

b. time

c. mass

d. distance

d. distance

The process of removing an electron from an atom is:

a. annihilation

b. atomization

c. ionization

d. none of the above

c. ionization

X-rays & gamma rays differ in:

a. the energy source that produces them

b. the effect they have on matter

c. their energy level

d. all of the above

a. the energy source that produces them

X-rays are produced:

a. from unstable atoms

b. using fast-moving electrons

c. using fast-moving atoms

d. using fast-moving metals

b. using fast-moving electrons

Radio waves are used in:

a. computed tomography (CT)

b. ultrasound (US)

c. radiography

d. magnetic resonance imaging (MRI)

d. magnetic resonance imaging (MRI)

The electromagnetic radiation that passes between the television remote & television is:

a. visible light

b. infrared light

c. microwaves

d. ultraviolet light

b. infrared light

An object we see as white is __________ all of the wavelengths of visible light.

a. absorbing

b. diffusing

c. reflecting

d. changing

c. reflecting

An object we see as black is __________ all of the wavelengths of visible light.

a. absorbing

b. diffusing

c. reflecting

d. changing

a. absorbing

The electromagnetic radiation used in tanning beds is:

a. visible light

b. infrared light

c. microwaves

d. ultraviolet light

d. ultraviolet light

Particulate radiation includes:

a. alpha particles

b. x-ray particles

c. beta particles

d. a. & c.

e. b. & c.

d. a. & c.

Alpha & beta particles are similar to x-rays & gamma rays in that they:

a. have no mass

b. are part of the electromagnetic spectrum

c. have the energy to ionize matter

d. have characteristics of wavelength & frequency

c. have the energy to ionize matter

The general process of a radioactive element giving off excess energy & particles to regain stability is:

a. radioactivity

b. radioactive decay

c. ionization

d. electron emission

b. radioactive decay

Radioactive elements:

a. have excess energy in their nuclei

b. emit particles & energy

c. are trying to become stable elements

d. all of the above

d. all of the above

Half-life is:

a. the rate at which a radioactive material decays

b. half the time it takes for all the radioactivity to decay

c. the rate at which particulate radiation is emitted from a radioactive atom's nucleus

d. none of the above

a. the rate at which a radioactive material decays

Half-life is defined as:

a. half the time it takes for all of the remaining atoms in an amount of a radioactive element to decay

b. half the time it takes for half the remaining atoms in an amount of a radioactive element to decay

c. the time it takes for half the remaining atoms in an amount of a radioactive element to decay

d. none of the above

c. the time it takes for half the remaining atoms in an amount of a radioactive element to decay

When the alpha particle picks up two electrons as it passes through air, it becomes a:

a. neutral hydrogen atom

b. radioactive hydrogen atom

c. neutral helium atom

d. radioactive helium atom

c. neutral helium atom

The positively charged beta particle is a(n):

a. electron

b. alpha particle

c. negatron

d. positron

d. positron

As compared to an alpha particle, a beta particle:

a. has less mass

b. has more mass

c. has the same mass

d. is less penetrating

a. has less mass

Electromagnetic radiation is a form of energy that originates from the __________.

atom

In the formula E=hf, h represents:

Planck's constant (equal to 4.135 x 10^-15 eV sec; 6.626 x 10^-34 J sec)

Electromagnetic radiation exhibits properties of a wave or a particle depending on its energy & in some cases, its environment. This phenomenon is called __________.

wave-particle duality

The basic formula for calculating wavelength or frequency is __________.

velocity = frequency x wavelength (v=fλ)

In the formula E=hf, f represents:

a. Planck's constant

b. frequency

c. energy

d. electricity

b. frequency

The formula E=hf demonstrates that:

a. as frequency increases, energy decreases

b. as frequency increases, energy increases

c. as energy increases, heat decreases

d. as energy increases, heat increases

b. as frequency increases, energy increases

In the formula E=hf, energy is measure in:

a. volts (V)

b. amps

c. frequency volts (fV)

d. electron volts (eV)

d. electron volts (eV)

Frequency is typically measured in:

a. hertz

b. feet

c. centimeters

d. meters

a. hertz

1 kilohertz (kHz) is equal to __________ Hz.

1,000

An ion pair is:

a. an electron & proton

b. a proton & neutron

c. an atom & the electron that was removed from it

d. an atom with an extra electron & an atom that is missing an electron

c. an atom & the electron that was removed from it

Gamma rays are produced:

a. from unstable atoms

b. using fast-moving electrons

c. using fast-moving atoms

d. using fast-moving metals

a. from unstable atoms

Alpha particles consist of:

a. 2 protons & 2 electrons

b. 2 protons & 2 neutrons

c. 2 electrons & 2 neutrons

d. none of the above

b. 2 protons & 2 neutrons

When compared with a beta particle, the alpha particle is:

a. much smaller

b. much larger

c. more penetrating

d. none of the above

b. much larger

Electromagnetic radiation:

a. has no mass

b. has significant mass

c. has varying amounts of mass

d. none of the above

a. has no mass

An alpha particle is the same as the nucleus of a(n):

a. hydrogen atom

b. oxygen atom

c. carbon atom

d. helium atom

d. helium atom

A negatively charged beta particle behaves the same as a(n):

a. proton

b. neutron

c. electron

d. positron

c. electron