7
Introduction to Radiographic Testing
l log m·n =log m +log n
l log m/n =log m – log n
l log mn =n log m
2. Radiography commonly uses log to base 10 and log to base e, also referred to as the natural log. To
convert between base 10 and base e:
log e X =ln X =(2.302585)·log10 X
Note the more conventional abbreviation ln in place of log for base e.
Introduction to Radiographic Testing
l log m·n =log m +log n
l log m/n =log m – log n
l log mn =n log m
2. Radiography commonly uses log to base 10 and log to base e, also referred to as the natural log. To
convert between base 10 and base e:
log e X =ln X =(2.302585)·log10 X
Note the more conventional abbreviation ln in place of log for base e.