There are three optical media 1,2 and 3 with their refractive index `mu_(1)`, `mu_(2)` and `mu_(3)` such that `mu_(1)gtmu_(2)gtmu_(3)` choose the correct options (TIR means total internal reflection)

Options

A. When a ray of light travels from medium 3 to 1 no TIR can take place.
B. Critical angle between medium 1 and 2 is less then the critical angle between 1 and 3.
C. Critical angle between medium 1 and 2 is more then the critical angle between 1 and 3.
D. if `C_(1)` and `C_(2)` and `C_(3)` are the speed of light in medium 1,2 and 3 then `C_(1)ltC_(2)ltC_(3)`

Answer

A, B