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An object is placed infront of a thin convex lens of focal length 30 cm and a plane mirror is placed 15 cm behind d lens. If d final image of d obj coincides wid d obj, d dis of obj frm the lens is?

pooja naik , 12 Years ago
Grade 12
anser 2 Answers
Saurabh Singh
the object is kept 60cm away from the lens.
Thanks and regards.
Saurabh Singh
askIITians Faculty
B.Tech.
IIT Kanpur
Last Activity: 12 Years ago
pooja naik
@Saurabh sir, the ans is 30cm away from the lens. BUT i didnot understand how. So, asked.....
Last Activity: 12 Years ago
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