Question

If the angle of incidence is ${70}^o$, then calculate the angle between the incidence ray and the reflected ray.

• A. ${50}^o$
• B. ${140}^o$
• C. ${130}^o$
• D. ${80}^o$

Answer 1

The correct option is B ${140}^o$

Since for a plane angle of incidence is equal to angle of reflection.

So, if angle of incidence is ${70}^0$ then angle of reflection is also ${70}^0$.

So angle between incident ray and reflected ray is $i+r={70}^0+{70}^0={140}^0$