TCDHA Rad Theory FINAL question n answers graded A+ 2023/2024

TCDHA Rad Theory FINALFirst invented X-rays - correct answer Wilhelm Conrad Roentgen 1895 Classifications of ionizing radiation - correct answer electromagnetic, particulate electromagnetic radiation - correct answer man made or occurs naturally, possesses no mass Particulate radiation - correct answer tiny particles of matter that possess mass and travel in straight lines and at high speeds Tube head is immersed in - correct answer oil, to provide electrical insulation and dispense of heat Cathode - correct answer negative charge terminal made of tungsten anode - correct answer postive charge terminal made of copper Cones - correct answer 8 or 16 inches Collimator - correct answer Lead disk to restrict the size of the beam High mA produces - correct answer lighter image Low kVp produces - correct answer High contrast transformers - correct answer A device that increases or decreases the voltage of an electrical current Compton scattering - correct answer 62 percent Roentgen does not have a _____________ - correct answer SI equivalent Paralelling technique advantages - correct answer accurate, simple, standardized paralelling technique disadvantages - correct answer film placement, discomfort increased target receptor distance - correct answer avoids magnification central ray is _____degrees to receptor - correct answer 90 if the lack of parallelism is _______ the image is acceptable - correct answer less than 20 central ray is _______degrees to tooth surface - correct answer +10 Radiolucent - correct answer appears dark radiopaque - correct answer appears light airspace - correct answer black space between teeth Xray film layers - correct answer film base, adhesive layer, film emulsion, protective layer what is the thickest layer of xray film? - correct answer base components of film emulsion - correct answer gelatin and silver halide crystals latent image - correct answer remains invisible until the film is processed