Absorption losses due to atomic defects mainly include . . . . . . . .

Radiation
Missing molecules, oxygen defects in glass
Impurities in fiber material
Interaction with other components of core

The correct answer is: B. Missing molecules, oxygen defects in glass.

Absorption losses due to atomic defects mainly include missing molecules, oxygen defects in glass. These defects can cause the light to be absorbed by the material, which reduces the amount of light that is transmitted through the fiber.

Radiation is not a major cause of absorption losses in optical fibers. Impurities in fiber material can also cause absorption losses, but these are usually not as significant as the losses due to atomic defects. Interaction with other components of core is not a major cause of absorption losses in optical fibers.

Here is a more detailed explanation of each option:

  • Option A: Radiation is not a major cause of absorption losses in optical fibers. Radiation can cause the light to be scattered, but this is usually not a significant loss.
  • Option B: Missing molecules, oxygen defects in glass are the main cause of absorption losses in optical fibers. These defects can cause the light to be absorbed by the material, which reduces the amount of light that is transmitted through the fiber.
  • Option C: Impurities in fiber material can also cause absorption losses, but these are usually not as significant as the losses due to atomic defects.
  • Option D: Interaction with other components of core is not a major cause of absorption losses in optical fibers.