radiology jepordy

Who discovered radiation?

Wilhelm Conrad Roentgen

What is radiation

A form of energy carried by waves or a stream of particles.

What is the maximum number of electrons that can exist in each shell?

2, 8, 18, 32, 50

What is matter?

Anything that occupies space and has mass

What is an atom?

The fundamental unit of matter.

What is the shell located closest to the nucleus?

K Shell

What carries a + charge?

A proton

What carries a – charge?

electron

What carries no charge?

a nuetron

What is a neutral atom?

An atom that contains an equal number of protons and electrons.

What is a wavelength?

he distance between the crest of one wave to the crest of the next.

What is the speed of the wave?

velocity

What are wavelengths measured in

nanometers

What is the step-down transformer used for?

To decrease the voltage from the 110 line to the 3-5 volts.

What is the step-up transformer used for?

To increase the voltage from 65,000 to 100,000 volts.

What is the amount of energy converted to x-rays?

Less than 1%

What are examples of electromagnetic radiation?

Gamma rays, radio waves, cosmic rays, microwaves, x-rays, radar waves.

What is radioactivity?

The process by which certain unstable atoms undergo decay in an effort to attain a more balanced nuclear state.

What are the three components of an x-ray machine?

The control panel, the extension arm, and the tube head.

What is the purpose of the aluminum filter?

Filters out long wavelengths.

What is the collimator used for?

Restricts the size of the x-ray beam

What is the most common possibility when an x-ray photon interacts with matter?

Compton scatter

What happens during ionization?

An atom loses an electron

What year were x-rays discovered?

1895

Who exposed the first dental radiograph on a live person or who introduced paralleling?

C. Edmund Kells

What is amperage?

The measurement of the number of electrons moving through a conductor.

What are wavelengths measured in?

Nanometers

What is the lowest wavelength on the electromagnetic spectrum?

Radio waves

What is the purpose of the anode?

Converts electrons into x-ray photons.

What is frequency?

The number of wavelengths that pass a given point in a certain amount of time.

What are the properties of x-rays?

• Invisible

• No mass or weight

• Travel at speed of light

• Travel in waves

• Travel in straight lines

What are particulate radiations?

Tiny particles of matter that possess mass and travel in straight lines at high speed.

What are some uses of dental radiographs?

• Detects lesions

• Evaluates growth & development

• Provides info during dental procedures

• Confirms or classifies suspected disease

What are the four types of particulate radiation?

• Electrons

• Alpha particles

• Protons

• Neutrons