A) 20 cm
B) 10 cm
C) 25 cm
D) 30 cm
Correct Answer: B
Solution :
[b] |
Image formed by lens |
If image position does not change even when mirror is removed it means image formed by lens is formed at centre of curvature of spherical mirror. |
Radius of curvature of mirror = 80 - 60 = 20 cm |
focal length of mirror f = 10 cm |
for virtual image, object is to be kept between focus and pole. |
maximum distance of object from spherical mirror for which virtual image is formed, is 10cm. |
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