Question:
Which of the following is due to inhomogeneous refractive index of earth’s atmosphere?
Which of the following is due to inhomogeneous refractive index of earth’s atmosphere?
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The apparent shape of the Sun is altered by the Earth's atmosphere, particularly during sunrise and sunset, due to atmospheric refraction.
Updated On: Dec 15, 2025
- Red colour of the evening Sun.
- Blue colour of the sky.
- Oval shape of the evening Sun.
- Large apparent size of the evening Sun.
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The Correct Option is C
Solution and Explanation
Step 1: Understanding atmospheric refraction.
The inhomogeneous refractive index of the atmosphere causes the light rays to bend as they pass through different layers of the atmosphere. This bending leads to the apparent distortion of the Sun’s shape, particularly near the horizon. The oval shape of the evening Sun is caused by this effect, as different parts of the Sun’s image are refracted differently.
Step 2: Conclusion.
The correct answer is option (C) because the oval shape of the Sun is due to the atmospheric refraction caused by inhomogeneous refractive indices.
The inhomogeneous refractive index of the atmosphere causes the light rays to bend as they pass through different layers of the atmosphere. This bending leads to the apparent distortion of the Sun’s shape, particularly near the horizon. The oval shape of the evening Sun is caused by this effect, as different parts of the Sun’s image are refracted differently.
Step 2: Conclusion.
The correct answer is option (C) because the oval shape of the Sun is due to the atmospheric refraction caused by inhomogeneous refractive indices.
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