Question

A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence $\left(\angle i\right)$. He then measures the corresponding values of the angle of refraction $\left(\angle r\right)$ and the angle of emergence $\left(\angle e\right)$ for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be :
(a) $\angle i>\angle r>\angle e$
(b) $\angle i=\angle e>\angle r$
(c) $\angle i<\angle r<\angle e$
(d) $\angle i=\angle e<\angle r$

Answer 1

$\angle i=\angle e>\angle r$