Question

the ray of light makes an angle of 50℃ with the surface S1 of the glass slab . it's angle of incidence will be ......?
a.50℃ b.40℃ c.140℃ d. 0℃​

Answer 1

$\huge{\textbf {\underline{\underline {ANSWER}}}}$

Of the light ray makes an angle of 50° with the surface S1 of the glass slab . it's angle of incidence will be $\textbf{\underline{40}}$

Answer 2

One of the ray makes an angle of 50°

With the surface SI of glass slab its angle of incidence will be 40.