Question

An incident ray strikes a plane mirror at an angle of ${15}^{\circ }$ with the mirror. The angle between the incident ray and reflected ray (vectors) is

• A. ${15}^{\circ }$
• B. ${30}^{\circ }$
• C. ${150}^{\circ }$
• D. ${60}^o$

Answer 1

The correct option is C ${150}^{\circ }$

Angle of incidence$=90-15={75}^o$

therefore,

Angle of reflection$={75}^o$ (since angle of incidence is equal to angle of reflection)

Hence the angle between the incident ray vector R reflected ray vector is ${75}^0+{75}^0={150}^0$