Unit 3 Chapter 3

Question 0

A form of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space

Answer 0

Electromagnetic energy

Question 1

Electromagnetic Energy that has neither mass nor electric charge but interacts with matter as though it is a particle

Answer 1

Photon

Question 2

The smallest quantity of electromagnetic energy

Answer 2

Photon

Question 3

A small bundle of energy

Answer 3

Quantum

Question 4

Travels at the speed of light

Answer 4

Photon

Question 5

What forms of electromagnetic energy are described as photons?

Answer 5

X-rays light and other forms

Question 6

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

Answer 6

The smallest quantity of any type of electromagnetic radiation is a photon.

Question 7

What is the velocity of all electromagnetic radiation?

Answer 7

The velocity of all electromagnetic radiation is 3 ´ 108 m/s

Question 8

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

Answer 8

A hertz is equal to 1 cycle per second

Question 9

The _____ of electromagnetic radiation is constant.

Answer 9

The velocity of electromagnetic radiation is constant.

Question 10

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

Answer 10

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

Question 11

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

Answer 11

The intensity of radiation decreases in inverse proportion to the square of the distance of the object from the source

Question 12

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

Answer 12

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

Question 13

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

Answer 13

The intensity of radiation on an object is reduced with distance because the radiation is spread out over a greater area.

Question 14

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?

Answer 14

If the intensity of light from a flashlight is 4 millilumens (mlm) at a distance of 3 feet using the inverse square law, it will be 1 millilumen at 6 feet.

Question 15

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

Answer 15

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

Question 16

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

Answer 16

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

Question 17

X-rays are usually identified by their _____.

Answer 17

X-rays are usually identified by their energy

Question 18

The lowest energy range of the electromagnetic spectrum is _____.

Answer 18

The lowest energy range on the electromagnetic spectrum is radio waves.

Question 19

Gamma rays are produced in the _____ of the atom.

Answer 19

Gamma rays are produced in the nucleus of the atom.

Question 20

Photons tend to interact with matter _____ their wavelength

Answer 20

Photons tend to interact with matter equal in size to their wavelength.

Question 21

Photons with the highest frequencies have the _____

Answer 21

Photons with the highest frequencies have the shortest wavelengths

Question 22

A fluoroscopy unit is run at 30 inches source-to-skin distance and produces an exposure of 100mR/week. What is the exposure if it is run at 90 inches source to skin distance?

Answer 22

11.1 mR/week

Question 23

What type of relationship does frequency and wavelength have in the electromagnetic spectrum?

Answer 23

Inverse relationship

Question 24

What happens to the frequency of a sine wave if the wavelength is doubled?

Answer 24

Frequency is halved

Question 25

Which portion of the electromagnetic spectrum contains photons withthe highest velocity?

Answer 25

No change in velocity

Question 26

Which color of visible light has the longest wavelength?

Answer 26

red

Question 27

Which color of visible light has the highest energy?

Answer 27

violet

Question 28

Which of the following does NOT use microwaves? doppler radar monitoring cell phone communication speed monitoring TV remote controls

Answer 28

TV remote controls

Question 29

What differentiates a light photon from an x ray photon frequency wavelength energy velocity all of the above a, b and c

Answer 29

a, b, and c

Question 30

Which of the following relationships is TRUE concerning the energy of electromagnetic radiation? The energy of a wave will increase as it wavelength increases The energy of a wave will increase as its frequency increases The energy increases as the velocity of the wave increases The energy of the wave increases as the mass increases

Answer 30

The energy of a wave will increase as its frequency increases

Question 31

The partial absorption of energy by any form of matter is termed

Answer 31

Diffraction

Question 32

Exitation and immediate release of a photon is

Answer 32

Reflection

Question 33

The mass-energy equivalency of electromagnetic energy and matter was first predicted by:

Answer 33

Albert Einstein

Question 34

Which of the following is not a variation of the electromagnetic wave equation? c=fl E=hf f=c/l l=c/f

Answer 34

E=hf

Question 35

Electromagnetic radiation travels:

Answer 35

In waves along a striaght path

Question 36

Electromagnetic radiation travels in bundles of energy called

Answer 36

Photons

Question 37

Wavelength is defined as the distance from:

Answer 37

Peak to peak of the wave

Question 38

Waves of radiation are called

Answer 38

Sine waves

Question 39

Frequency is defined as:

Answer 39

The number of waves passing a point per unit of time

Question 40

Wavelength and frequency are

Answer 40

Inversely proportional to each other

Question 41

All photons with wavelengths longer than x-rays act primarily as waves. T or F

Answer 41

True