A beam of light is incident on the surface of a block of flint glass at an angle of 30.0° with respect to the normal (a

[answerhappygod]

A beam of light is incident on the surface of a block
of flint glass at an angle of 30.0° with
respect to the normal (a line perpendicular to the surface at the
spot where the ray hits the block).
A fraction of the light is reflected and the rest refracted.
What is the angle (in degrees) between the reflected and refracted
beams?
1. ___?___°
If you could circle the answer for 1. that'd be great, thank you
very much!