Question

Watching the sunset on a beach, one can see the sun for several minutes after it has 'actually set'. Explain.

Answer 1

The apparent delay in the setting of sun is due to the phenomenon of atmosphere refraction$.$

The atmosphere bends sunlight towards the normal$.$ This is the reason for the apparent position of the sun remaining above the horizon for some time even when$,$ the sun has actual set$,$ $i.e.,$ gone below the horizon$.$

Hence$,$ we experience a delayed sunset$.$