The image formed by spherical mirror is real, inverted and is of magnification-2. If the image is at a distance of 30 cm from the mirror, where is the object placed? Find the focal length of the mirror. List two characteristics of the image formed if the object is moved 10 cm towards the mirror.
Given,
Image is real i.e. it is formed on same side of object, it is inverted and magnified so it must be concave mirror.
Image distance v= -30 cm
Magnification = -2
Object distance = -15 cm
Object is placed to the left of the mirror so object distance U= -15 cm.
We know that mirror formula is:
f = -10 cm
If the object is moved 10 cm towards the mirror i.e. Object distance = -15-(-10)
= -5cm
Which means that object is placed between pole and focus of the concave mirror so Image will be
● Virtual and erect
● Enlarged