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Grade 12Wave Optics

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?

Profile image of pooja naik
12 Years agoGrade 12
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2 Answers

Profile image of Saurabh Singh
12 Years ago
the object is kept 60cm away from the lens.
Thanks and regards.
Saurabh Singh
askIITians Faculty
B.Tech.
IIT Kanpur
Profile image of pooja naik
12 Years ago
@Saurabh sir, the ans is 30cm away from the lens. BUT i didnot understand how. So, asked.....

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