A ray of light strikes a plane mirror at an angle of incidence $i = 20^\circ$. If the mirror is rotated by an angle of $15^\circ$ about the point of incidence, by how many degrees does the reflected ray rotate?

• A$7.5^\circ$
• B$15.0^\circ$
• C$30.0^\circ$
• D$45.0^\circ$

Choose an answer — or press 1234