DANB STUDY EXAM | QUESTIONS & 100% VERIFIEDANSWERS | LATEST UPDATE | PASSED

DANB STUDY EXAM | QUESTIONS & 100% VERIFIEDANSWERS | LATEST UPDATE | PASSED Who created the x rat Correct Answer: Roentgen (1895) What did the bluish colored light roentgen & others were interested in finding end up bring? Correct Answer: A stream of electrons that traveled from the cathode to the end of the tube the anode. When he placed metal objects in front of the beam what happened? Correct Answer: There was no visible image. The metal blocked the beam. Paper and wood allowed the ray to do what? Correct Answer: Allowed the x ray to pass through + the glow of the fluorescent screen changed according to the density of the object The soft tissue of the hand had what affect on the x ray? While harder ones did what? 2 Correct Answer: Allowed x rays to pass through while hard tissue of the hand stopped the x ray Glow of screen changed according to Correct Answer: Density of object Couple of the first radiographs made were of? Correct Answer: Roentgens shotgun barrel & wife berthas hand Roentgen was awarded the first Nobel prize in physics when? Correct Answer: 1901 Who was the first to take a dental radiograph two weeks after the discovery of the x ray in Germany? Correct Answer: Dr. Otto Walkoff. Used small glass plate coated with photographic emulsion with exposure time of 25 minutes to obtain desired result. Who took the first Intraoral radiograph using his own equipment& techniques? Correct Answer: New orleand dentist C. Edmund Kells tomography Correct Answer: radiographic image of a selected slice of tissue 3 How has x ray film changed throughout history Correct Answer: At first, glass photographic plates were used, later fill was cut to size in the darkroom & wrapped in paper + rubber coating then prewarapped film packets. What was introduced in 1987 & currently used in many offices? Correct Answer: Digital imaging Radiation is a type of ______. Correct Answer: Electromagnetic energy Waves only consist of energy. No ___ is involved, only energy. Correct Answer: Mass Forms of electromagnetic radiation with shorter wavelengths are Correct Answer: x rays & gamma rays Invisible x rays, used for diagnosis in dentistry