NEET Physics Optical Instruments MCQ Question
Which of the following statements about optical instruments is correct?
The thin lens formula is applicable for both convex and concave lenses for real and virtual images.
The focus of a lens is always on the same side as the object being viewed.
The focal length of a convex lens is always positive, while that of a concave lens is always negative.
The two foci of a lens are located at different distances from its optical center.
Correct Answer
Detailed Explanation
The thin lens formula, 1/f = 1/v - 1/u, is valid for both convex and concave lenses and for both real and virtual images, as stated in the NCERT context. The other options contain misconceptions about lens properties.
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