Question

Assertion (A) : The height of an object is always considered positive.

Reason (R) : An objective is always placed above the principal axis in the upward direction.​

Answer 1

Answer:

Both A and R are true and R is the correct explanation of A

Explanation:

Answer 2

• The sign conventions for the lens and mirrors state that the object or image above the principal axis would be considered positive.
• Hence, the image formed below the principal axis would be considered negative.
• We know that the object is always placed above the principal axis.
• Therefore, it will always be considered positive.

The correct option would be that both assertion and reason are true. The reason is the correct explanation of assertion.

Hence, the correct option would be A.