Question

what is the total length and power of plane mirror​

Answer 1

Answer:

To my knowledge

Plane mirrors are the only type of mirror for which a real object always produces an image that is virtual, erect and of the same size as the object.

As Virtual objects produce real images, however.

The focal length of a plane mirror is infinity;as its optical power is zero

Explanation:

Answer 2

Answer:

Optical power is the degree to which a lens, mirror, or other optical system converges or diverges light. It is equal to the reciprocal of the focal length of the device. Power (P) = 1/f, where f is focal length Now, Focal length of the plane mirror = ∞ Therefore, Power of plane mirror= 1/∞ =0