Question

please give me this ans !!​

Answer 1

Answer

(look at the pic) At A

Angle of incidence = 38° >(ic)

$⇒\colorbox{lighteen} {TIR takes place}$

The ray is now incident on surface CD at B,

hex angle of incidence = 42°

$\colorbox{lightgn} {Angle of refraction = 90°}$

$\\ \\ \\ \\ \colorbox{lightgreen} {\red★ANSWER ᵇʸɴᴀᴡᴀʙ⌨}$