A point object is placed at a distance of 60 cm from a convex lens of focal lenght 30 cm . If a plane mirror were put perpendicular to the principle axis of the lens and at a distance of 40cm form it, the final image would be formed at the distance of :
20 cm form the lens,it would be real image.
30 cm from the lens, it would be a real image .
30 cm from the plane mirror, it would be a virtual image .
20 cm from the plane mirror, it would be a virtual image .
Object at 2f ,image at 2f
virtual object for plane mirror
Real Image by plane mirror