A beam of light passes through a material A, with a refractive index of 1.5, to material B with a refractive index of 1. Which of the following is the critical angle of the light?
W) sin⁻¹(2/3) [inverse sine of two thirds]
X) cos⁻¹(2/3) [inverse cosine of two thirds]
Y) cos⁻¹(3/2) [inverse cosine of three halves]
Z) sin⁻¹(3/2) [inverse sine of three halves]
✔️Answer:W) sin⁻¹(2/3)
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