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Why is the Sun visible 2 minutes before sunrise and 2 minutes after sunset?
AThe Earth's magnetic field bends light (option)
BAtmospheric refraction bends sunlight around the curvature of the Earth
CThe Sun is brighter than the sky
DDispersion of light
Answer & Solution
Correct answer: B. Atmospheric refraction bends sunlight around the curvature of the Earth
1. Atmospheric layers bend sunlight progressively as it traverses denser air.
2. This bending makes the Sun visible while it is still geometrically below the horizon.
3. Hence apparent sunrise is 2 minutes before the real sunrise.
_Source: NCERT Class 10 Science, Ch 10 "The Human Eye and the Colourful World", §10.5_
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