What is the Mona Lisa painting famous for?

her haircut

her mysterious smile

her eyes

her clothes

Mona Lisa is famous for an optical illusion aka 'the mysterious smile'. The illusion is caused due to peripheral vision as the focus of the viewer shifts from the eyes of the portrait to the lips of the portrait.

Psyché

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Which area is brighter?

Both are the same

It depends on the order of seeing

How many dots at the intersections are black?

The bright circle around the Sun seen in the picture is known as a halo. What causes it?

refraction of light in ice crystals

refraction in the lens of the eye or lens

refraction of light in water drops

reflections from the water surface

Who wrote the novel "Marriage"?