Dear Student , Here in this case , sin isin r=2⇒sin isin 30°=2⇒sin i=2×12=12⇒sin i=sin 45°⇒i=45° Regards

Solve 15

Dear Student ,
Here in this case ,

\frac{\sin i}{\sin r} = \sqrt{2} \Rightarrow \frac{\sin i}{\sin 30 °} = \sqrt{2} \Rightarrow \sin i = \sqrt{2} \times \frac{1}{2} = \frac{1}{\sqrt{2}} \Rightarrow \sin i = \sin 45 ° \Rightarrow i = 45 °

Regards