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Light – Reflection and Refraction — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
Question
What is the value of $n_2 \times{ }_2 n_1$ ?
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Answer

The value is 1 , because both the refractive indicies $n_2$ and ${ }_2 n_1$ are reciprocals of each other.

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