Check your math. When I put ##e^{-2.117}## into my calculator, I don't get 0.75.Adam Rabe said:
omfg i got it. thanks a lot i derped out with the log rules.Drakkith said:
Percentage transmittance gamma ray through lead refers to the amount of gamma radiation that passes through a lead barrier compared to the original amount of radiation. It is a measure of how much radiation is able to penetrate through a material.
The percentage transmittance gamma ray through lead is calculated by dividing the amount of radiation that passes through the lead barrier by the original amount of radiation and multiplying by 100. This gives a percentage value that represents the amount of radiation that was able to pass through the lead.
Lead is commonly used as a barrier for gamma rays because it has a high atomic number and density, which makes it effective at absorbing and scattering gamma radiation. It is also readily available and relatively inexpensive.
The thicker the lead barrier, the lower the percentage transmittance of gamma rays. This is because thicker barriers provide more material for the gamma rays to interact with, increasing the likelihood of absorption or scattering.
Other factors that can affect the percentage transmittance of gamma rays through lead include the energy and wavelength of the gamma rays, the type of lead used, and the composition and thickness of any additional layers or materials used in the barrier.