Question

An object is at a distance of 5 cm from a convex mirror of focal length 10 cm. where is the image formed & what is its

magnification?
please help with this question ​

Answer 1

Answer :

Distance of object = 5cm

Focal length = 10cm

Type of mirror = convex

We have to find distance of image and magnification $.$

★ Focal length of convex mirror is taken positive and that of concave mirror is taken negative.

Distance of image can easily be calculated by using mirror formula which is given by

• 1/u + 1/v = 1/f

u denotes distance of object

v denotes distance of image

f denotes focal length

By substituting the values, we get

➠ 1/(-5) + 1/v = 1/10

➠ 1/v = 1/10 + 1/5

➠ 1/v = 3/10

➠ v = 10/3

➠ v = 3.33 cm

★ Magnification :

➙ m = -v/u

➙ m = -3.33/(-5)

➙ m = 0.67

★ Type of image :

• Virtual
• Erect
• Short