45. The figure shows light passing through a spherical raindrop, undergoing two refractions and total internal reflection. What is the correct relation among angleΦ in the figure, the incident angleθ, and the refractive index of the raindrop n?

(A)Φ = 4 sin⁻¹ (sin 2θ /n) − θ
(B) Φ= 2 sin⁻¹ (sin 2θ /n) − 2θ
(C) Φ = 4 sin⁻¹ (sin θ /n) −θ
(D) Φ = 4 sin⁻¹ (sinθ /n) − 2θ
(E) Φ= 2 sin⁻¹ (sin θ /n) − 2θ

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