Question

An object is placed = 5.0 cm in front of a concave mirror whose focal length is f= 11.5 cm.What is the magnification of the image?
plz give me ans urgently​

Answer 1

Answer:

therefore magnification of the object is 5

Explanation:

it is given that an object is placed 20cm in front of a concave mirror whose focal length is 25cm.

we have to find the magnification of object.

object distance, u = -20 cm

focal length, f = - 25 cm

using formula, 1/v + 1/u = 1/f

⇒1/v + 1/-20 = 1/-25

⇒1/v = 1/20 - 1/25 = (25 - 20)/500

⇒1/v = 5/500 = 1/100

⇒v = 100cm

now magnification = -v/u

= -100/(-20) = 5

therefore magnification of the object is 5