What will happen if angle of incidence on a glass slab is 0?

[Yatin]

I have a conceptual doubt. pl help me clarify it:
What will happen if angle of incidence on a glass slab is 0? will refraction take place, or reflection, or both?

 

[drvrm]

What will happen if angle of incidence on a glass slab is 0? will refraction take place, or reflection, or both?

the incident light at any angle gets reflected and refracted ...it depends what you are looking for!

 

[James R]

At zero degrees, part of the light goes into the slab and part is reflected back at zero degrees (along the direction of incidence).