Dental Radiology Exam 2026 – 300+ Q&A | University of Michigan School of Dentistry

Dental Radiology Questions and Correct
Answers/ 2026 Update
Who h,discovered h,the h,x-ray?

ANS>> h,Wilhelm h,Roentgen



What h,year h,was h,the h,x-ray h,discovered?

ANS>> h,1895



How h,did h,Roentgen h,discover h,x-rays?

ANS>> h,While h,experimenting h,with h,a h,cathode h,ray h,tube



What h,is h,ionization?

ANS>> h,The h,production h,of h,ions h,(an h,atom h,that h,gains h,or h,loses h,an h,electron h,and h,becomes h,electrically
unbalanced)
h,




When h,an h,electron h,is h,removed h,from h,an h,atom h,in h,the h,ionization h,process h,what h,results?

ANS>> h,Ion h,pair



When h,an h,atom h,becomes h,an h,ion h,pair h,the h,atom h,becomes

what? h,The h,atom h,becomes h,the h,positive h,ion
h,




When h,an h,ion h,pair h,is h,formed h,the h,ejected h,electron h,becomes h,what?

ANS>> h,The h,ejected h,electron h,becomes h,the h,negative h,ion



What h,is h,ionizing h,radiation?

ANS>> h,Radiation h,that h,is h,capable h,of h,producing h,ions h,by h,removing h,or h,adding h,an h,electron h,to h,an
h,atom; h,x-rays h,produce h,ionization

,What h,is h,particulate h,radiation?

ANS>> h,Tiny h,particles h,of h,matter h,that h,possess h,mass h,and h,travel h,in h,straight h,lines h,at h,high h,speeds



What h,type h,of h,radiation h,is h,electrons?

ANS>> h,Particulate



What h,type h,of h,radiation h,is h,beta h,particles?

ANS>> h,Particulate



What h,type h,of h,radiation h,is h,cathode h,rays?

Particulate
h,




What h,type h,of h,radiation h,is h,protons?

ANS>> h,Particulate



What h,type h,of h,radiation h,is h,alpha h,particles?

ANS>> h,Particulate



What h,type h,of h,radiation h,is h,neutrons?

ANS>> h,Particulate



What h,is h,Electromagnetic h,radiation?

ANS>> h,The h,propagation h,of h,wave-like h,energy h,(without h,mass; h,without h,particles) h,through h,space h,or
h,matter




What h,type h,of h,radiation h,are h,cosmic h,rays?

ANS>> h,Electromagnetic



What h,type h,of h,radiation h,are h,x-rays?

,Electromagnetic



What h,type h,of h,radiation h,are h,microwaves, h,radio h,waves?

ANS>> h,Electromagnetic



What h,type h,of h,radiation h,are h,gamma h,rays?

ANS>> h,Electromagnetic



What h,type h,of h,radiation h,are h,ultraviolet h,rays?

ANS>> h,Electromagnetic



What h,type h,of h,radiation h,is h,visible h,light?

ANS>> h,Electromagnetic



What h,is h,velocity?

ANS>> h,The h,speed h,of h,waves



What h,are h,wavelengths?



The h,distance h,between h,the h,crest h,of h,one h,wave h,to h,the h,crest h,of h,the h,next h,wave



What h,is h,frequency?

ANS>> h,The h,number h,of h,wavelengths h,that h,pass h,a h,point h,in h,a h,certain h,amount h,of h,time



What h,is h,an h,x-ray?

ANS>> h,Electromagnetic h,ionizing h,radiation h,of h,VERY h,SHORT h,WAVELENGTH h,resulting h,from h,the
bombardment h,of h,tungsten h,by h,highly h,accelerated h,electrons h,in h,a h,vacuum. h,HIGH h,FREQUENCY.
h,




What h,form h,do h,x-rays h,have?

, ANS>> h,They h,have h,a h,wave h,form



How h,do h,x-rays h,travel?

ANS>> h,They h,travel h,in h,waves h,with h,short h,wavelengths h,and h,high h,frequency



What h,speed h,to h,x-rays h,travel?

ANS>> h,A h,the h,speed h,of h,light h,(186,00 h,miles/second)

What h,do h,x-rays h,have h,the h,power h,to h,penetrate?

ANS>> h,Substance



Are h,x-rays h,visible?

ANS>> h,NO h,they h,are h,invisible



Do h,x-rays h,have h,mass?

ANS>> h,NO



Do h,x-rays h,have h,weight?

ANS>> h,NO



Do h,x-rays h,have h,charge?

ANS>> h,NO



What h,are h,x-rays h,absorbed h,by?

ANS>> h,Matter



What h,do h,x-rays h,exert?

ANS>> h,They h,exert h,an h,effect h,on h,living h,tissue; h,x-rays h,are h,able h,to h,stimulate h,or h,destroy h,living h,cells



When h,do h,x-rays h,lose h,intensity?