is this another error in the nelson thornes textbook?
on page 208 (chapter 13 exam style questions)
question 2a), you only had to draw the rays, but the answer mentions that the angle of incidence of the ray emerging from the base of the glass block into the air, is 40 degrees
I'm sure its 5 degrees...
the angle of an incident ray and its refracted (or reflected) ray is always the same between two substance, right?