प्रश्न-4.
Q-4,
फैवरी पैरो इटालान क्या है।
What is Fabry-Perot Etalon.
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The Fabry-Perot interferometer uses the phenomenon of multiple beam interference that arises when light shines through a cavity bounded by two reflective parallel surfaces. Each time the light encounters one of the surfaces, a portion of it is transmitted out, and the remaining part is reflected back.
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