We are concerned with the scattering, absorption, and re-emission of light as the light travels through tissues.
{"Image DocumentName": "Interaction of Light and Matter", "Image ImageDescription": "We are concerned with the scattering, absorption, and re-emission of light as the light travels through tissues. - Photons of light can be absorbed by electrons in the tissue material. This takes photons out of the beam of transmitted light and the intensity of the beam diminishes. - Absorbed photons can be re-emitted and these re-emitted photons can be in any direction. This also contributes to the lowering of the transmitted beam intensity. - Photons do not have to get absorbed (and eventually re-emitted) by electrons in the tissue material. Instead they can be scattered off of electrons (like pool balls) and if photons are scattered away from the transmitted beam, the beam intensity decreases. Here we are concerned with the intensity of light and further we\u2019ll be interested in the transfer of photon energy to body tissue.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}