Question

An image with twice the size of the object is produced on a screen using a convex lens of focal length 15cm.

1. What is the Object distance from lens ?

2. What is the image distance from lens ?​

Answer 1

Answer:

Explanation:

Image size =2×object size

Magnification=2

=>Magnification=(image distance)/object distance

=>V=2U

By using formula

1/V – 1/U =1/f

Or, 1/2U + 1/U =1/15

Or, U =object distance =22.5 c.m

2) image distance from lens is 2×object distance from lens

So , image distance from lens=45 c.m