Home » Power of the lens is -40, its focal length is Light MCQs Power of the lens is -40, its focal length is May 2, 2022 108 Views Q. Power of the lens is -40, its focal length isA. 4mB. -40mC. -0.25mD. -25mAnswer: -0.25m
A man runs towards the plane mirror at 2 m/s. The relative speed of his image with respect to him will be
If a diverging lens is to be used to form an image which is one fourth of the size of the object where must the object be placed?
