Question

give reasons_ in barber shop concave mirror are used

Answer 1

Well, concave mirrors are mostly use for shaving in a barber shop

You see when a person stands in front concave mirror then that person can see an erect, virtual and magnified image of him.

Actually concave mirror of a larger focal length is used for shaving purpose.

Answer 2

In barbershops, concave mirrors are used because they produce magnified images and help in shaving.

• The light is reflected inward towards the focal point in a concave mirror and thus it helps to focus the light. The reflecting surface in a concave mirror is distanced away from the incident light.
• The concave mirror is used in many barbershops for shaving as it helps to provide an enlarged view of the object when placed in front of it.
• When a concave mirror is placed closer to the face than the focal length of the mirror then it produces a magnified and erect image of the face and this helps the barber in shaving with precision because of the magnifying effect of the mirror.