A convex lens produces a magnification of –3 for an object placed at 1.5 m from the lens. Find the image distance (with correct sign).

Correct option is B

Given:

• A convex lens produces a magnification of –3
  
• object placed at 1.5 m from the lens.
  

Formula used:

m = $$\frac{v}{u}$$

Solution:

Substitute the given values into the magnification formula

- 3 = $$\frac{v}{-1.5}$$

-3 $$\times$$ - 1.5 = v

4.5 = v

v= 4.5m