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There are three ways that radiating light can interact with matter. (a)List those  processes and Illustrate each processes using simple two level system. (b) which  one is the basis of lasing? (c) In that (lasing) process, explain why emitted photon  has the same phase, polarization and direction as the exciting photon.

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Physics

There are three ways that radiating light can interact with matter. (a)List those 
processes and Illustrate each processes using simple two level system. (b) which 
one is the basis of lasing? (c) In that (lasing) process, explain why emitted photon 
has the same phase, polarization and direction as the exciting photon.

Answer & Explanation Solved by verified expert
3.6 Ratings (390 Votes)
a The three processes are absorption reflection and transmission Absorption can be illustrated in the following way Consider a 2level system with an electron say in the lower state energetically Then an incoming photon can interact with the electron and if enough energy is available to the electron due    See Answer
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