Question

When the glancing angle of incidence of light on a material is 30$^\circ$, the reflected and refracted light are found to be perpendicular. The refractive index of material is

• A. 1.73
• B. 0.5
• C. 2.35
• D. 1.33

Answer 1

Answer: (A)

1.73

Answer 2

n = tan $z_p \,=\, tan (90^{\circ} \,-\, 30^{\circ}) \,=\, tan 60^{\circ} \,=\, 1.732$