Deck 3: Electromagnetic Energy

Question 1

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

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

Answer 1

frequency

Question 2

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

Answer 2

is spread out over a greater area

Question 3

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

Answer 3

decrease by half

Question 4

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

Question 5

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

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

Question 6

X-rays are usually identified by their _____.

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

Question 7

The _____ of electromagnetic radiation is constant.

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

Question 8

What is the electromagnetic wave equation?

A) $\mathrm { c } = \mathrm { f } \lambda$
B) $c = f / \lambda$
C) c = fv
D) $c = f - \lambda$

Question 9

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

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

Question 10

Gamma rays are produced in the _____ of the atom.

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

Question 11

The lowest energy range of the electromagnetic spectrum is _____.

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

Question 12

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

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

Question 13

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 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 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 17

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 18

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 19

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

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