NEET Physics Total Internal Reflection MCQ Question
You are given four sources of light each one providing a light of a single colour- red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90°. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?
The beam of red light would undergo total internal reflection
The beam of red light would bend towards normal while it gets refracted through the second medium
The beam of blue light would undergo total internal reflection
The beam of green light would bend away from the normal as it gets refracted through the second medium
Correct Answer
Detailed Explanation
Total internal reflection occurs when light travels from a medium with a higher refractive index to a lower one, and the angle of incidence exceeds the critical angle. Red light, having a longer wavelength, would have a smaller critical angle compared to yellow light.
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