The Sun is seen little before it rises and for a short while after it sets. This is because of
[amp_mcq option1=”total internal reflection” option2=”atmospheric refraction” option3=”apparent shift in the direction of Sun” option4=”dispersion” correct=”option2″]
This question was previously asked in
UPSC NDA-1 – 2019
– When the Sun is below the horizon, the light rays from it are refracted (bent) downwards as they enter the atmosphere, making the Sun appear to be above the horizon to an observer.
– This effect causes the Sun to be visible for a few minutes before its geometrical sunrise and after its geometrical sunset.