When a monochromatic ray of light is passed through an equilateral glass prism, it is found that the…
When a monochromatic ray of light is passed through an equilateral glass prism, it is found that the refracted ray in glass is parallel to the base of the prism. If ' $i$ ' and ' $e$ ' denote the angles of incidence and emergence respectively, then
$i>e$
$i < e$
$i=e$
$i+e=90^{\circ}$
Solution
The refracted ray is parallel to the base. This happens when the incident ray suffers minimum deviation. In this case $i=e$