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In reflection, angle i=angle r, therefore when a ray strikes surface normally angle i=0 and angle r=0. But there is no such rule in refraction(i=r). So,why, when a ray strikes the surface of separation of 2 media normally,it suffers no refraction? |
| Answer» In reflection, angle i=angle r, therefore when a ray strikes surface normally angle i=0 and angle r=0. But there is no such rule in refraction(i=r). So,why, when a ray strikes the surface of separation of 2 media normally,it suffers no refraction? | |