Question

The angle between a horizontal ruler and a vertical plane mirror is 30◦. The angle between the ruler and its image is: A. 15◦ B. 30◦ C. 60◦ D. 90◦ E. 180◦

Answer 1

The correctanswer is....

C. 60°

Answer 2

Answer:

Option C "$60^o$" is correct.

The angle between the ruler and its image is $60^o$

Explanation:

According to laws of reflection: The angle of incidence is equal to the angle of reflection.

Given that the angle between a horizontal ruler and a vertical plane mirror is $30^o$ i.e. the angle of incidence is $30^o$.

Therefore, the angle of reflection must also be $30^o$.

Thus, the angle between the ruler and its image is = $30^o +30^o =60^o$

Therefore, option C is correct.

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