Question

a concave mirror forms threebtime large image find out position of object and position and position of image​

Answer 1

Answer:

A convex lens of focal length 30 cm forms a real image three times larger than the object on a screen. 

Explanation:

Object and screen are moved until the image becomes twice the size of the object. If the shift of the object is 6 cm. the shift of screen is (7x) cm. find value of x