AN OBJECT IS PLACED 20CM IN FRONT OF A CONCAVE MIRROR WHOSE FOCAL LENGTH IS 25 CM. WHAT IS THE MAGNIFICATION OF OBJECT?
Answers
therefore magnification of the object is 5
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
also read similar questions : an object is placed in front of a concave mirror of focal length 20cm three times the size of the object calculate the d...
https://brainly.in/question/6090763
an object is placed at a distance of 40 cm in front of concave mirror of focal length 20cm list four characteristics of ...
https://brainly.in/question/13169431
Answer:
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