Question

sove if u know dont solve if u dont know​

Answer 1

$\small \red{given}$

$angle \: of \: incident \: i \: = \: angle \: of \: emergence = \frac{3}{4} a$

$where \: a \: = \: angle \: of \: prism$

$since \: prism \: is \: equilateral \: a \: = 60$

$i = e = 60° \times \frac{3}{4} = 45°$

$from \: prism \: formula$

$angle \: of \: deviation = i + e - a = 45 + 45 - 60 = 30°$