Question

does the shadow really vanish in the zero shadow condition

Answer 1

The shadow vanishes twice a year for a minute. People who live near the equator pass through the plane of the solar system once in every six months.

When the vertical object is placed in the sun around noontime, the shadow will get shorter and disappeared. It reappears in about a minute’s time. It can also be said that the shadow appears exactly under the object. Hence the shadow will not vanish.

Answer 2

Answer:

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Explanation:

Extreme 1: no shadow because of excessive light from all side.

To create a situation where you might not see your own shadow in this scenario, you would have to be hit by light sources from all around you, the best thing would be a lit LED sphere, while you’re floating in mid-air. The strength of the light would have to be exactly equal from all sides. This should lead to a condition where you would cast no shadow, esp. because any shadow you might cast after all would be cast onto another light source, and therefore be negated.

Extreme 2: You’re in absolute darkness.

That one’s much easier. Step into a room with a really good door, and no windows. If it’s perfectly sealed by an opaque substance (like walls made of cement), there will be no light rays that could be blocked by your body, and therefore there’s also no shadow.

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