How is radiactivedating performed Two way sexy video chat
Yet, you’ve heard the news: Earth is 4.6 billion years old. That corn cob found in an ancient Native American fire pit is 1,000 years old. Geologic age dating—assigning an age to materials—is an entire discipline of its own.In a way this field, called geochronology, is some of the purest detective work earth scientists do.Likewise, a radiation dose will tell us about an effect the radiation has on tissue. Absorbed dose is the concentration of energy deposited in tissue as a result of an exposure to ionizing radiation.Note: In this case, it means the energy absorbed by human tissue.Radiation from medical examinations is similar to sunlight.The effect of sunlight on the skin depends on the light's intensity and how long a person stays in it.For example, the head is less sensitive than the chest.
Here is an easy-to understand analogy for your students: relative age dating is like saying that your grandfather is older than you.
For patients, the most important dose quantity is effective dose, because it allows for simple comparisons of long-term risks. A dose of radiation is not the same as a dose of medication.
Radiation dose has many forms and includes: absorbed dose, equivalent dose and effective dose.
X-rays, unlike sunlight, can penetrate deep into the body and deposit energy in internal organs. Absorbed dose describes the intensity of the energy deposited in any small amount of tissue located anywhere in the body.
The unit of measurement for absorbed dose is the milligray (m Gy).