random ass crap we needa know Flashcards
(19 cards)
___, a Bavarian physicist , discovered the x-ray on ___.
Wilhelm Conrad Roentgen/ Nov 8 1895
Roentgen made the 1st human body radiograph of ____ and exposed it for ___.
his wife’s hand on a photographic plate / 15 minutes
Who made the 1st DENTAL radiograph in 1895?
German Dentist, Otto Walkhoff
(using a glass photgraphic plate wrapped in black paper & rubber and exposed himself for 25 mins)
Who made the 1st dental radiograph in the US in 1895?
New York physician, W.J. Morton
(using a skull)
Who started using x-rays in dentistry and on REAL people in 1896?
New Orleans dentist, C. Edmund Kells
What year was intraoral digital imaging introduced in France
1987
Anything that occupies space and has mass is ____.
Matter
When matter is altered, ___ results?
Energy
The number of protons and neutrons in the nucleus of an atom determines its ___ or ____.
Mass number/ atomic weight
The # of protons inside the nucleus = the # of electrons outside the nucleus determines the ___.
Atomic number
K- shell electrons
70 KeV
Radiation capable of producing ions by removing or adding an electron to an atom is ___.
Ionizing radiation
Ionizing radiation has two groups
1) __
2) __
1) particulate radiation
2) electromagnetic radiation
tiny particles of matter that posses mass and travel in straight lines and @ high speeds is ____
Particulate radiations
propagation of wavelike energy (without mass) though space and matter
Electromagnetic radiation
__ characterizes electromagnetic radiations as waves and focuses on the properties of velocity, wave-length, and frequency as follows
Wave Concept
the speed of the wave
Velocity
How fast do xray waves travel?
3 x 10^8 meters per second [186,000 miles per second]
