Is the Propagating Wave in the Last Block Still IR?

[rr00053]

hi all...
I have general query...this is simple i guess but is haunting me because i don't knw this...

consider 3 blocks of different materials (say metal and dielectrics) which is kepy one over the other...when an em wave is passed through these structures at the first metal it will undergo reflection and part will be transmitted...this transmitted wave at the interface of the first metal and the second metal again undergo partial reflection and partial transmision...this transmitted wave propogates into the next block and in the next interface agian undergoes the same procedure...My doubt is if we are using a particular em wave (say IR) then can we consider the part of the wave which is propogating in the last block as the same IR wave or is it considered as any other form of energy like phonnon vibration?

I hope my question was clear...please reply to this

 

[NateD]

...Yes, the part of the wave which is propagating in the last block is still considered to be the same IR wave. The only difference is that it has been partially reflected and transmitted at the different interfaces between the blocks. This process is known as wave propagation, and it can help us understand how waves interact with different materials.