Solve question 12 12 Light from a luminous point on the lower face of a 2 cm - Physics - Ray Optics and Optical Instruments

Question

Solve question 12

12 Light from a luminous point on the lower face
of a 2 cm thick glass slab, strikes the upper face and the totally
reflected rays outline a circle of radius 3 2 cm on the lower face
What is the refractive index of the glass

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Solve question 12 12. Light from a luminous point on the lower face of a 2 cm thick glass slab, strikes the upper face and the totally reflected rays outline a circle of radius 3.2 cm on the lower face. What is the refractive index of the glass.

Solve question 12

12. Light from a luminous point on the lower face of a 2 cm thick glass slab, strikes the upper face and the totally reflected rays outline a circle of radius 3.2 cm on the lower face. What is the refractive index of the glass.