Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
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Consider the following statements about refraction: 1. Refraction occurs due to the change in speed of light when it passes from one medium to another. 2. If light enters a denser medium, it bends away from the normal. 3. The refractive index of air with respect to water is greater than 1. Which of the above statements is/are correct?
Step-by-Step Solution
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Statement 1 is correct — refraction is caused by the change in the speed of light. Statement 2 is incorrect — when light enters a denser medium, it bends towards the normal. Statement 3 is correct — water is denser than air, so air with respect to water has a refractive index greater than 1.