Question

If the angle of incidence is$30°$, then the angle of reflection will be

• A. $15°$
• B. $30°$
• C. $45°$
• D. $60°$

Answer 1

The correct option is B

$30°$

Step 1: Given data and drawing the diagram of the situation

GIven data:

The angle of incidence $\left(\angle i\right)$=$30°$

The angle of reflection $\left(\angle r\right)$=?

Step 2: Formula used

According to laws of reflection,

The angle of incidence $\left(\angle i\right)$= angle of reflection$\left(\angle r\right)$……….(1)

Step 3: Calculating the angle of reflection

On, putting all the given values in equation (1) we get,

$\left(\angle r\right)$=$30°$

The angle of reflection will be$30°$.

Hence, option B is correct.