Answer:
the critical angle of the flint glass is 37.04⁰
Explanation:
to calculate the critical angle for total internal reflection.
given,
wavelength of the flint glass = λ = 580.0 nm
= 580 × 10⁻⁹ m
critical angle = sin^{-1}(\dfrac{\mu_a}{\mu_g})
at the wavelength of 580.0 nm the refractive index of the glass is 1.66
refractive index of air = 1
critical angle = sin^{-1}(\dfrac{1}{1.66})
= 37.04⁰
hence, the critical angle of the flint glass is 37.04⁰
