Question

NO SPAMMING......ANSWER THIS​

Answer 1

answer.

$refractive \: index \: is \: 1.5 \\ \\ we \: know \: that \: \\ \\ \\ n = \frac{ \sin(i) }{ \sin(r) } \\ \\ \\ n = \frac{ \sin(30) }{ \sin(19.5) } \\ \\ we \: know \: that \: \\ \\ \sin(30) = \frac{1}{2} \\ and \: \sin(19.5) = \frac{1}{3} \\ hence \: \\ \\ n = \frac{ \frac{1}{2} }{ \frac{1}{3} } \\ \\ n = \frac{3}{2} \\ \\ n = 1.5$

Answer 2

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Refer to the attachment ❤️