Question

Plz answer fast....will mark brainliest​

Answer 1

Answer:

sin⁻¹(8/9)

Explanation:

Refractive indices of glass and water are 1.5 = 3/2 and 4/3.

From Snell's law,

μ₁ sinθ₁ = μ₂ sinθ₂

The critical angle,

θₙ = sin⁻¹(μ₁/μ₂)

    = sin⁻¹(4/3 * 2/3)

    = sin⁻¹(8/9)

Hope it helps!