Question

An object is placed at the following
a convex lens of
focal length 15cm.
distance from
a.) 35cm
c) 20cm
b) 30 cm
d) 10cm
which position of object will produce
image of same size as that of
object ? List two characteristics of
image​

Answer 1

Answer:

Option B) 30 cm

Two characteristics of the image formed are :

• the image is real as it is formed by the actual intersection of the rays.
• the image is inverted

Explanation:

A convex lens forms an image of the same size as the object only when the object is placed at 2f.

Since focal length (f) of the given lens is 15cm,

therefore, 2f = (2 * 15) cm = 30cm.

Hope it helps.