NEET Physics Lenses MCQ Question
Which of the following statements about lens combinations is true?
The effective focal length of multiple lenses in contact is found by taking the reciprocal of the sum of their individual focal lengths.
All lenses in combination produce a real image regardless of their individual properties.
The power of a lens combination is simply the average of the individual powers of the lenses.
Concave lenses always add to the focal length of convex lenses in combination.
Correct Answer
Detailed Explanation
The effective focal length of several thin lenses in contact is given by the reciprocal of the sum of their individual focal lengths, as stated in the NCERT context. This relation demonstrates how multiple lenses can be combined to achieve desired optical properties.
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