If angle of incidence is equal to angle of refraction in a transparent slab then the value of i is

If angle of incidence is equal to angle of refraction in a transparent

1.	If angle of incidence is equal to angle of refraction in a transparent slab then the value of i is
Answer» 0degrees It will be 0 if the slab is made of a medium other than air, then the value of I=r= 0 , I.e. it is normal incidence for any value of refractive index.