Law of Reflection and Paraxial Rays – Rankers Physics

Reflection by Plane Mirror: Practice Problem & Solution

Assertion (A): Law of reflection is applicable for all type of mirrors. Reason (R): Rays which are parallel to the principal axis are known as paraxial rays.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Reflection by Plane Mirror. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is true. The laws of reflection hold for all types of mirrors.

Reason (R) is false. Paraxial rays are rays close to and making small angles with the principal axis; not all parallel rays are paraxial, nor are all paraxial rays parallel to the axis.

Hence, (A) is true and (R) is false.

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