Exam 1: The History of Ionizing Radiation and Basic Principles of X-Ray Generation

The distance from the crest of one wave to the crest of another wave is called the frequency.The wavelength of a wave is the number of oscillations per unit of time.

Ultrasonic radiation is part of the electromagnetic spectrum,and has no effect on tissue.

The difference in the electromagnetic spectrum between x-rays and visible light lies in the:

Identify the metal used in the focal spot of the x-ray tube:

The release of electrons from the hot tungsten filament at the cathode is called the thermionic emission effect.

Ionization occurs:

All of the following are the basic elements of an x-ray tube needed to produce x-rays EXCEPT one.Which one is the EXCEPTION?

Federal regulations require that all dental x-ray machines have which of the following?

The total x-ray energy produced by the collision of the electrons with the target inside the x-ray tube is approximately:

Each of the following are properties of x-rays EXCEPT one.Which one is the EXCEPTION?

The amount of heat produced in the x-ray tube is less than the amount of radiation produced.

Each of the following are examples of particulate radiation EXCEPT one.Which one is the EXCEPTION?

The duty rating refers to the number of consecutive seconds a machine can be operated before it overheats,and the duty cycle refers to the portion of every minute that the dental machine can be used without overheating.

The tungsten filament in the x-ray tube is found at the cathode.

Particulate radiations are most commonly emitted from radionuclides.

Identify the particles that compose the nucleus of an atom:

The target or focal spot in the x-ray tube can be found at the:

In a stable atom the number of orbiting electrons (-)equals the number of protons (+)in the nucleus.Therefore,the atom is electrically neutral.

Electromagnetic spectrum is a grouping of electrons.