Question

Tolong dibantu sama caranya..

Answer 1

Diketahui :
 λ = 5000 A = 5x10⁻⁷ m
n = 2
g = 500 grs/mm = 500000 grs/m

ditanyakan :
α = ?

jawab :
1/g sin α = n λ
1/500000  sin α = 2 x 5x10⁻⁷
1/500000 sin α = 10⁻⁶
2x10⁻⁶ sin α =10⁻⁶
sin α = 10⁻⁶/2 x10⁻⁶
sin α = 1/2
sin α = sin 30
α = 30