Formulas Flashcards
(7 cards)
1
Q
What are the 2 formulas for magnification factor?
A
MF=SID/SOD
MF=IMAGE SIZE/OBJECT SIZE
2
Q
What is the formula for SOD
A
SOD=SID-OID
3
Q
What is the formula for penumbra?
A
P=FS*OID/SOD
4
Q
What is the formula for density maintenance?
A
MAS1/MAS2=(SID1/SID2)^2
5
Q
What is the formula for determining actual size of something based on image size and its magnification?
A
ACTUAL SIZE * MF = IMAGE SIZE
ACTUAL SIZE = IMAGE SIZE/MF
6
Q
What is the formula for determining mAs?
A
mAs=mA * s
7
Q
What is the inverse square law?
A
I1/I2=(D2/D1)^2
