The magnification of an object 2km tall where placed in 150m in front of a plane mirror is ?
To calculate the magnification of an object placed in front of a plane mirror, you need to know the object's height and the distance between the object and the mirror. In this case, the object's height is 2 km and the distance between the object and the mirror is 150 m.
The magnification (M) of a mirror is determined by the equation:
M = - d_i / d_o
where d_i is the image distance and d_o is the object distance. In the case of a plane mirror, the image distance is equal to the object distance, so:
d_i = d_o = 150 m
Plugging in these values, we get:
M = - 150 m / 150 m = -1
The magnification of the object is -1.
Note: The negative sign indicates that the image formed by a plane mirror is virtual and upright, meaning that it is not inverted or reversed.