PHYSICS

JAMB 2018 - Question 18

Physics 2018 JAMB Past Questions - Question 18: Which of the following may be used to explain a mirage? I. Layers of air near the road surface have varying refractive indices in hot weather II. Road surfaces sometimes become good reflectores in hot weather. III. Light from the sky can be reflected upward after coming close to the road surface.

Choose the correct answers from the options given.
Which of the following may be used to explain a mirage? I. Layers of air near the road surface have varying refractive indices in hot weather II. Road surfaces sometimes become good reflectores in hot weather. III. Light from the sky can be reflected upward after coming close to the road surface.
A:
B:
C:
D:
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Correct Answer

A

Explanation

Mirages are typically caused by variations in air temperature, which lead to changes in the refractive index of the air. So, I'd go with option I: "Layers of air near the road surface have varying refractive indices in hot weather." This creates a bending of light rays, causing the illusion of water or reflections on the road that aren't actually there.