Exam 1

Question 1

What is Radiation?

Answer 1

Energy that is transmitted through space or matter.

Question 2

What is Energy?

Answer 2

Is the ability to get things done

Question 3

What is Electromagnetic radiation (EMR) ?

Answer 3

Electromagnetic (EM) Energy is primary with the production of an X-Ray

Question 4

How is EMR energy measured in Electron Volts?

Answer 4

It is in Electron Volts

keV) 1000 eV= 1 kiloelectron volts (keV

Question 5

How is JUST EMR measured in Frequency?

Answer 5

Measured by frequency in Hertz

Question 6

What is Frequency?

Answer 6

Frequency is the rise and fall of a sine wave

Question 7

How do you measure a cycle?

Answer 7

From 1 peak to the next peak (or any other like point)

Question 8

T/F X-Rays have a Low frequency

Answer 8

FALSE. X-rays have a high frequency

Question 9

How is EMR measured by wavelength?

Answer 9

It is measured in meters (M)

Question 10

What is wavelength?

Answer 10

It is the distance between 1 peak of the wave to the next peak

Question 11

T/F X-Ray has a very short wavelength

Answer 11

TRUE

Question 12

Does all EMR travel at the speed of light

Answer 12

Yes, all EMR do.

Question 13

What are Photons

Answer 13

Also called quanta, they have NO mass and travel in BUNDLES (packets)

Question 14

How to photons travel?

Answer 14

They travel in waveform with varying wavelengths and frequencies

Question 15

T/F Photons gain intensity with increase in distance.

Answer 15

FALSE. photons LOSE intensity with increase in distance

Question 16

T/F photons can either be ionizing or non ionizing depending on certain wavelength

Answer 16

TRUE

Question 17

Can EMR be divided into ionizing and non ionizing radiation

Answer 17

Yes, has enough energy to remove (“knockout”) an electron

Question 18

How do you remove an electron?

Answer 18

To remove an electron its binding forces must be overcome which is causing imbalance

Question 19

T/F Ionizing radiation has low frequency and short wavelength

Answer 19

FALSE. Ionizing radiation does have VERY short wavelength, but has HIGH frequency. These are inversely related

Question 20

Do Short wavelength & High frequency give off high energy?

Answer 20

YES, It gives off high energy.

Question 21

What is the roentgen abbreviation?

Answer 21

R (Coulumbs/kg abbr. C/kg