Answer:
Angle of refraction is 23° .
Explanation:
[tex] \frac{ \sin(0w) }{ \sin(0a) } = \frac{n \: a}{n \: w} [/tex]
[tex] \frac{ \sin(30) }{ \sin \: 0a } = \frac{1.3}{1.0} [/tex]
[tex] \sin \: 0w \: = \: \frac{ \sin(30) }{1.3} [/tex]
[tex] = 0.3846153846[/tex]
[tex] \sin^{ - 1} (0.3846153846[/tex]
[tex]0w \: = \: 23 ^{o} [/tex]