physics part 4
Why is luminous intensity relevant to radiography?
Monitor display and light output of detectors in CR
What are the long-range forces?
Magnetism and gravity
What causes electromagnetic radiation?
Caused by moving electric charges that have an associated magnetic field and electric field
When is an atom said to be electrically neutral?
When the number of protons matches the number of electrons in orbit around it
What do filament electrons transfer to outer shell electrons when producing heat?
Some of their kinetic energy
What can x-ray photons that become scatter radiation cause?
Add noise to the x-ray image if detected
What happens when some of the ions formed during radiation recombine?
Breaking of valency bonds and produces free, highly reactive ions capable of forming new bonds to other ions
Why do we need anything more than absorbed dose?
Need quantities which reflect type of radiation and tissue/organ sensitivity