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Physics CBSE Live product
Class 10
Light reflection and refraction
Image formation of lens
11.
HOTS - Power of combination of lens
Question:
2
m.
Two lenses of \(+2\ D\) and \(-2\ D\) are placed in close contact. The focal length of the combination is:
\(Zero\)
\(\infty\)
\(Zero\ or\ \infty\)
\(Two\)
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