RAD 103 Bushong Chap 2

Which of the following is NOT a form of electromagnetic radiation:

• x-rays

• visible light

• microwaves

• alpha radiation

Most of the radiation the average person receives comes from:

• medical radiation

• nuclear power plants

• his/her own body

• terrestrial radiation

Sound waves are a good example of radiation as:

• electromagnetic waves

• mechanical waves in a medium

• particular wavelength

• natural radioactivity

According to the graph below, how much radiation was required to cause 65% of a population of rats to develop leukemia?

• 8mR

• 127mR

• 140mR

• 165mR

In full scientific notation, the number 0.0081 is:

• 8.1 X 10 ^-3

• 8.1 X 10³

• 0.81 X 10⁴

• 0.81 X 10^-4

What is the “long-hand” expression for 4.2 X 10⁴

• 420

• 4,200

• 42,000

• 420,000

As the distance from the x-ray tube to the image receptor plate changes, the intensity of radiation changes:

• proportionately to the distance

• by inverse proportion to the distance

• according to the square of the distance

• according to the inverse square of the distance

To multiply numbers with exponents:

• multiply the exponents

• divide the exponents

• add the exponents

• subtract the exponents

The value 0.72 expressed as a percentage is:

• 0.00072%

• 0.72%

• 7.2%

• 72%

40 ms = ____ s

• 0.04

• 0.4

• 40,000

• 4000,000