NEET Physics Optical Instruments MCQ Question
Which of the following statements about optical instruments is correct?
Total internal reflection occurs when light travels from a denser to a rarer medium at an angle greater than the critical angle.
The refractive index of a medium is always greater than one for all materials.
The angle of deviation in a prism is independent of the angle of incidence.
The path of a ray in a prism can be traced back to show that the angle of incidence equals the angle of refraction.
Correct Answer
Detailed Explanation
Total internal reflection happens when light travels from a denser medium to a rarer medium at an angle greater than the critical angle, leading to no refraction above the water surface, as described in the NCERT context.
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