Question

Why does light changes its path as the medium changes during transit

Answer 1

It's because the velocity of light varies according to the medium,as the speed decreases and increases in differentmedium,this makes light ray to move towards or away from normal bychanging its direction or path in thatmedium.

Answer 2

a light ray needs enough space to move further, if it goes through a denser medium,then, it's speed gets reduced due to which it bends as particles of the denser medium doesn't allow the rays to easily move, on the other hand, if it goes into the rarer medium, it's speed gets increased

. it is like if we are travelling through a crowded place, the people of the crowd make it hard for us to move easily..and we have to change our path..