Which of these is not a shadow-casting principle?
A) A large focal spot
B) Long target—image receptor distance
C) Short object—image receptor distance
D) Parallel object—image receptor relationship
A
Explanation: A) A small focal spot reduces the size of the penumbra (partial shadow around the objects of interest), resulting in a sharper image and slightly less magnification.
B) A small focal spot reduces the size of the penumbra (partial shadow around the objects of interest), resulting in a sharper image and slightly less magnification.
C) A small focal spot reduces the size of the penumbra (partial shadow around the objects of interest), resulting in a sharper image and slightly less magnification.
D) A small focal spot reduces the size of the penumbra (partial shadow around the objects of interest), resulting in a sharper image and slightly less magnification.
You might also like to view...
What are paramedics?
a. People trained in basic life support b. Also known as an Emergency Medical Technicians (EMT) c. Licensed medical personnel who render emergency treatment at the scene of an accident d. Emergency room nurses
How long is a pharmacist allowed to dispense partial fillings for a Schedule II drug?
a. One day b. Three days c. Seven days d. Ten days