Question

what is the answer? ​

Answer 1

Answer:

$\frac{3n_{1}}{4}$

Explanation:

Effective refractive index, $n=\frac{n_{1}n_{2}}{n_{1}+n_{2}}$

                                              = $\frac{n_{1}*3n_{1}}{n_{1}+3n_{1}}$

                                              = $\frac{3n_{1}}{4}$

Answer 2

Answer:

3ni/4 is the correct answer ist it correct Your answer is above

Explanation:

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