Question

answer this question fast(if know then answer if don't then don't answer)​

Answer 1

Answer:

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ANSWER =$\frac{ \sqrt{3} }{2}$

Explanation:

Given =angle I is 60 degree

angle r is 45 degree

from Snell'law

$=ua \times \sin(60) = ub \times \sin(45)$

$=\frac{ub}{ua} = \frac{ \sin(60) }{ \sin(45) } = \frac{ \frac{ \sqrt{3} }{2} }{ \frac{1}{ \sqrt{2} } }$

$=\frac{ \sqrt{3} }{2} \times \sqrt{2}$

$= \frac{ \sqrt{3} }{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} }$

$= \frac{ \sqrt{3} }{2}$

$(a) = \frac{ \sqrt{3} }{2}$

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