During an experiment on an optics bench a monochromatic ray is directed towards a plane mirror.
(a) Express an angle of 1.10rad in degrees, correct to one decimal place.
(b) The ray is incident on the mirror at an angle of 1.10rad with the normal. Determine the angle of reflection in (i) radians and (ii) degrees.
(c) The mirror is replaced so that the incident angle becomes 60∘. By how much has the incident angle changed, expressed in radians?