Deck 3: Electromagnetic Energy

Question 1

The intensity of radiation _________ in _________ proportion to the square of the distance of the object from the source.

A) increases, direct
B) decreases, direct
C) increases, inverse
D) decreases, inverse

Answer 1

decreases, inverse

Question 2

X-rays are usually identified by their __________.

A) energy
B) velocity
C) wavelength
D) hertz

Answer 2

energy

Question 3

The energy of a photon is directly proportional to its ___________.

A) amplitude
B) frequency
C) velocity
D) wavelength

Answer 3

frequency

Question 4

The rate of rise and fall of a sine wave is called its __________.

A) amplitude
B) frequency
C) wavelength
D) velocity

Question 5

Photons tend to interact with matter __________ their wavelength.

A) equal in size to
B) larger in size than
C) smaller in size than
D) unequal in size to

Question 6

What is the electromagnetic wave equation?

A) c = fl
B) c = f/l
C) c = fv
D) c = f-l

Question 7

The diagnostic range of x-ray energy is _____________.

A) 30 to 150 kVp
B) 200 to 300 kVp
C) 300 to 1000 kVp
D) over 1 MV

Question 8

Gamma rays are produced in the ___________ of the atom.

A) outer electron shell
B) inner electron shell
C) nucleus
D) K-shell

Question 9

The mass equivalent of a 100 KeV photon of radiation can be calculated using the _____.

A) inverse square formula
B) equivalent Planck equation
C) relativity formula
D) Planck quantum equation

Question 10

If the intensity of light from a flashlight is 4 millilumens (mlm) at a distance of 3 feet, what will the intensity be at 6 feet?

A) 0.4 millilumens
B) 1 millilumen
C) 2 millilumens
D) 16 millilumens

Question 11

The _________ of electromagnetic radiation is constant.

A) amplitude
B) velocity
C) frequency
D) wavelength

Question 12

A hertz (Hz) is equal to _____ cycle(s) per second.

A) 103
B) 102
C) 10
D) 1

Question 13

The lowest energy range of the electromagnetic spectrum is ____________.

A) sound waves
B) radio waves
C) gamma rays
D) microwaves

Question 14

The four properties of photons are ________, ________, ________ and ________.

A) size, shape, spin, mass
B) frequency, mass, amplitude, wavelength
C) frequency, wavelength, velocity, amplitude
D) refraction, velocity, spin, amplitude

Question 15

Photons with the highest frequencies have the ____________.

A) highest velocity
B) lowest energy
C) longest wavelengths
D) shortest wavelengths

Question 16

The smallest quantity of any type of electromagnetic radiation is a(n) ________.

A) photon
B) electron
C) neutrino
D) quark

Question 17

The intensity of radiation on an object is reduced with distance because the radiation ___________.

A) reduces its velocity
B) increases in wavelength
C) loses its energy
D) is spread out over a greater area

Question 18

The reduction of radiation intensity due to scattering and absorption is called _____.

A) reflection
B) refraction
C) attenuation
D) dispersion

Question 19

What is the velocity of all electromagnetic radiation?

A) 8 × 103 m/s
B) 2 × 108 m/s
C) 3 × 108 m/s
D) 4 × 103 m/s

Question 20

If the wavelength of a beam of electromagnetic radiation increases by a factor of 2, then its frequency must ___________.

A) double
B) increase four times
C) decrease by half
D) remain constant