Physics-Optical Instruments
NEET Physics Optical Instruments MCQ Question
Type: MCQ-conceptual-Hard-Class 12
Which of the following statements about optical instruments is correct?
A
The thin lens formula is applicable for both convex and concave lenses for real and virtual images.
B
The focus of a lens is always on the same side as the object being viewed.
C
The focal length of a convex lens is always positive, while that of a concave lens is always negative.
D
The two foci of a lens are located at different distances from its optical center.
Correct Answer
Option A
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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