NEET Physics Lenses MCQ Question
Which of the following statements about lens combinations is correct?
The effective focal length of two thin lenses in contact is the sum of their individual focal lengths.
The power of a lens combination is always positive.
Combining lenses can only produce converging lenses.
The effective power of a combination of lenses is the algebraic sum of their individual powers.
Correct Answer
Detailed Explanation
The effective power of a combination of lenses is indeed the algebraic sum of their individual powers, as stated in the provided context. The effective focal length of two lenses in contact is given by the formula involving the reciprocal of the individual focal lengths, not their sum.
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