NEET Physics Refraction MCQ Question
Which of the following statements about refraction and total internal reflection are correct?
Total internal reflection occurs when the angle of incidence exceeds the critical angle.
Refraction always results in a loss of intensity of the light ray.
The angle of refraction can exceed 90 degrees under normal refraction conditions.
Refraction can occur without any change in the speed of light.
Correct Answer
Detailed Explanation
Statement A is correct as total internal reflection happens when the angle of incidence is greater than the critical angle, as stated in the context. Statement B is misleading because while some intensity is lost, total internal reflection does not allow any transmission at all. Statement C is incorrect because the angle of refraction cannot exceed 90 degrees in refraction. Statement D is false since refraction involves a change in the speed of light between different media.
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