Significance
An exposure of 500 roentgens in five hours is usually lethal for human beings.
The typical exposure to normal background radiation for a human being is about 200 milliroentgens per year, or about 23 microroentgens per hour.
When measuring dose absorbed in man due to exposure, units of absorbed dose are used (the related rad or SI gray), or, with consideration of biological effects from differing radiation types, units of equivalent dose, such as the related rem or the SI sievert.
Read more about this topic: Roentgen (unit)
Famous quotes containing the word significance:
“The hysterical find too much significance in things. The depressed find too little.”
—Mason Cooley (b. 1927)
“It is necessary not to be Christian to appreciate the beauty and significance of the life of Christ.”
—Henry David Thoreau (1817–1862)
“For a parent, it’s hard to recognize the significance of your work when you’re immersed in the mundane details. Few of us, as we run the bath water or spread the peanut butter on the bread, proclaim proudly, “I’m making my contribution to the future of the planet.” But with the exception of global hunger, few jobs in the world of paychecks and promotions compare in significance to the job of parent.”
—Joyce Maynard (20th century)