if the nature of the material is changed ,what about the refractive index ?
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Answer:
This is a wonderful question because it is really at the heart so many physical processes. My succinct, but possible perplexing, initial answer is that, "there is no such thing as an ideal bandpass filter." In this light, I think of a lumped circuit. In order to create a truly spectrally flat bandpass filter, one needs an infinite number of inductors and capacitors (resonances=poles). If you accept this claim, then it is obvious that a truly spectrally flat response is simply not possible for a circuit, as it would take up an infinite area....Now jump ahead to materials in the optical domain. You are essentially asking why don't materials respond the same way to all frequencies, i.e, why does the refractive index (real and imaginary parts) depend on frequency. In order for a material to respond without preference to any frequency would mean that the material would behave as an ideal band pass filter (or band stop) filter. This necessitates an infinite number of poles (or zeros). While poles in the circuit domain are associated with lumped LC resonances, they are associated with quantum mechanical transitions in the optical domain, i.e., electrons being excited/relaxed. In the end I would flip your question on its head and ask: Is it possible to create a (meta)material with a frequency independent complex response from IR to UV? I don't think it is but I would love to be wrong.
Answer:
పాండవుల గుణగణాల ఏమండీ ఏమండీ ఏమండీ ఏమండీ ఈ సందర్భంగా వారు మాట్లాడుతూ ప్రభుత్వం ప్రవేశపెట్టిన సంక్షేమ పథకాలు అమలు చేయాలని కోరారు ఏమండీ ఏమండీ ఏమండీ ఈ సందర్భంగా ఆయన మాట్లాడారు ఈ కార్యక్రమంలో సిఐటియు నాయకులు