There is no change of angle (bending) of the light rays. Each wavelength is slowed the same amount in the glass and is increased the same amount as it leaves the glass.

Question

http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/mch/refr/more.rxml
http://csep10.phys.utk.edu/astr162/lect/light/dispersion.html
http://en.wikipedia.org/wiki/Light_source

I hope this helps. Thanks for asking.

When a beam of white light passes perpendicularly through a flat pane of glass, it is not dispersed into a spectrum? Why not?