ریاضیات

n1 = 1     n2 = 1.5     θ1 = 30°

n1 sinθ1 = n2 sinθ2

1 × sin(30°) = 1.5 sinθ2

sinθ2 = 0.5 / 1.5

sinθ2 = 0.333

θ2 ≈ 19.47°

r_p =

(n2 cosθ1 − n1 cosθ2) /

(n2 cosθ1 + n1 cosθ2)

cos30° = 0.866

cos19.47° ≈ 0.943

r_p =

(1.5×0.866 − 1×0.943) /

(1.5×0.866 + 1×0.943)

r_p =

(1.299 − 0.943) /

(1.299 + 0.943)

r_p ≈ 0.159

R_p = |r_p|²

R_p = (0.159)²

R_p ≈ 0.025

t_p =

2n1 cosθ1 /

(n2 cosθ1 + n1 cosθ2)

t_p =

2×1×0.866 /

(1.5×0.866 + 0.943)

t_p =

1.732 / 2.242

t_p ≈ 0.773

T_p =

(n2 cosθ2 / n1 cosθ1) (t_p)²

T_p =

(1.5×0.943 / 0.866) × (0.773)²

T_p ≈ 0.975

R_p + T_p = 1

0.025 + 0.975 = 1