Answer:
Part a)
d = 4.64 m
Part b)
d = 2.4 m
Step-by-step explanation:
Part a)
If no refraction occurs then the light ray will move undeviating
So here we can say that the angle with the normal will remain same
so we have



so light will strike at distance of 4.64 m
Part b)
Now if refraction of light occurs
then we will use Snell's law



now we can use


