Wave Optics Part 1

Unpolarised light is incident on the boundary between two dielectric media, whose dielectric constants are 2.8 (medium -1) and 6.8 (medium 2 ), respectively. To satisfy the condition, so that the reflected and refracted rays are perpendicular to each other, the angle of incidence should be tan−1(1+‌

10

θ

)‌

1

2

the value of θ is ______.
(Given for dielectric media, µr=1 )