RE-NEET2026Physics-Optics
RE-NEET 2026 Physics Lens and Mirror Formula MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following measurements require 'index correction'?
A
Measurement of gravitational acceleration using simple pendulum
B
Measurement of focal length of lenses using optical bench
C
Measurement of speed of sound using resonance tube
D
Measurement of resistance of a wire using meter bridge
Correct Answer
Option B
Detailed Explanation
Index correction is required in optical measurements to account for the shift in the apparent position of the image due to the thickness of the lens or mirror.
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