Teaching EMRS JSA (Junior Secretariat Assistant) Mock Test Series 2023 General Science Physics Optics

ऑप्टिकल फायबर खालीलपैकी कोणत्या तत्त्वावर कार्य करते?

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विखुरलेले
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हस्तक्षेप
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एकूण अंतर्गत प्रतिबिंब
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अपवर्तन
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