Question

a real image 1/5 th the size of the object is formed at a distance of 18 cm from a mirror.calculate the focal length.draw the appropriate ray diagram. plz ray diagram​

Answer 1

Explanation:

Since the image is real and diminished, the lens must be convex and the object must be placed beyond 2F. Read more on Sarthaks.com - https://www.sarthaks.com/23270/real-image-size-of-the-object-is-formed-18-cm-from-lens-calculate-the-focal-length-of-the-lens