Chapter U5, Problem 19STP

Interpretation Introduction

Interpretation:

The status of visible light when it strikes a mirror needs to be determined.

Concept introduction:

Visible light can be defined as the light which is visible by naked eyes. There are several forms of light which is not visible to naked eyes such as ultra-violet light. Light can interact with different substances in three possible ways:

• Reflection − light bounces off an object
• Absorbance − light absorbs by an object
• Transmission− light travels through the object

Answer to Problem 19STP

Option (d) is the correct option.

Explanation of Solution

Reason for correct option:

When light strikes a mirror, it reflects from the mirror as it bounces off at a certain angle. Light always reflects in the opposite direction with the same angle of incident. For example,if the light strikes a plane mirror at a 50° angle from the right, it will bounce off at a 50°angle to the left. 

Conclusion

Reasons for incorrect options: Since mirror is a solid plane surface, therefore, absorption and transmission is not possible for light waves.