Question

When an object is placed at a distance of 30 cm from a spherical lens, its image is formed on the wall which is twice the size of the object. At what distance from the lens should the object be placed to obtain a virtual image three times the size of the object?

Answer 1

Answer:

first follow me

Explanation:

ok so follow me

Answer 2

The objects which have their own heat and light are called Luminous
The objects which do not have their own heat and light are called Non Luminous
Plane mirror is always convergent
Beam - group of rays
Types of beam
Convergent Beam
Meats
Intersects
Parallel Beam
Do not meats
Do not intersects
Divergent Beam
Do not meats
Do not intersects
Types of spherical mirror
Concave mirror
Convex mirror
Nature of concave mirror is convergent
Nature of convex mirror is divergent
Centre of a sphere center of curvature
Places of the object
At infinity
Behind Centre of Curvature
At Center of Curvature
Between Focus and Center of Curvature
At Focus
Between Focus and Pole when the object will be between this the image will always virtual
According to question the object is at Curvature so the answers 20 cm