Question

an object of height 4.0 cm is placed at a distance of 30 cm from the optical centre of a convex lens of focal length 20cm draw a ray diagram to find the position and size of the image formed mark optical Centre O and principal focus on the diagram also find the approximate review of size of the image to the size of the object

Answer 1

ans 60
size -8
virtual image

Answer 2

When a 4 cm high object is placed at a distance of 30 cm from the optical center of a convex lens of focal length 20 cm , then the object is formed on the other side of the lens at a distance of 60 cm from the optical center and the size of the object is 8 cm. The object is real, inverted and double than the real image.