Question

RISHIKESH PHYSICS CENTRE
10. A concave mirror having the focal length 15 cm, forms 17. A
an image having twice of the linear dimensions of the le
object. If the image is virtual, then the positions of the
object will be:
(a) 7.5 cm
(b) 22.5 cm
(c) 40 cm
(d) 30 cm
II. A doctor prescribes spectacles 10 a patient with a
combination of a convex lens of focal length 40 cm and
concave lens of focal length 25 cm, then the power of
18
​

Answer 1

The position of the object when the image is virtual will be ( a) 22.5 cm(b) 7.5 cm(c) 30 cm(d) 45 cm.