Question

a ray of light passing from one medium to another will not change its direction if the angle of incidence is : 0 degree or 45 degree or 90 degree or 60 degree????Give reason pls

Answer 1

the ray the angle of zero degree and 90 degree will not change their direction as 0° will straight forward pass from the other medium without passing from it and 90 degree will first perpendicular Re with only change in the speed but the angle with 45 and 60° will change because they are not considered in the critical angles

Answer 2

Hey..... here is your answer!!

The only parameter you have listed is that the "incident ray is normal to the glass slab." This means that that angle of incidence is 0 degrees from the normal. This implies that the transmitted angle would also be 0 degrees, the same as the incident angle, therefore refraction did not occur!

I hope it helps you!!