At what energies will the photoelectric effect, compton scattering, and pair production be the most important process for energy loss of photons in tissi 3. why is there a threshold for pair production?

Explained

Explanation:

The minimum energy required by a photon to create a electron-positron pair must be equal to the sum of rest mass energies of both electron and positron.

therefore E= 2m_ec^2

=2×0.511 MeV

=1.02 MeV

Below this , the process would not occur. So, in the energy range of > 1.02 MeV

The most dominant process will be in pair production.

At the range of 200 KeV to 3 MeV, The most dominant Process is compton Scattering.

below 200 KeV , Photo electric effect is more dominant.

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

they should be similar or the same