WAEC Physics 2015 Objective — Question 31
Question 31 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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Red light travels faster than blue light when both of them pass through a glass prism because the
- A. refractive index of red light is greater than that of blue light
- B. refractive index of blue light is greater than that of red lightCorrect
- C. red light is more intense than the blue light
- D. blue light is more intense than the red light
Explanation
Blue light is refracted (bent) more and travels slower in glass, meaning it has a higher refractive index than red light, which travels faster with a lower refractive index.
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