Question

explain the droplet effect in detail ​

Answer 1

Answer:

The black drop effect is an optical phenomenon visible during a transit of Venus ... Explanation of the Black-Drop Effect at Transits of Mercury and the Forthcoming Transit of Venus.

Explanation:

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Answer 2

When a drop of liquid lands on a surface much hotter than its boiling point, the bottom layer of the drop vaporizes instantly. ... Instead of instantly boiling away, the droplet can survive for several minutes. This image shows a droplet of liquid water experiencing this phenomenon, which is called the droplet effect.

The effect can be seen as drops of water are sprinkled onto a pan at various times as it heats up. Initially, as the temperature of the pan is just below 100 °C (212 °F), the water flattens out and slowly evaporates, or if the temperature of the pan is well below 100 °C (212 °F), the water stays liquid. As the temperature of the pan goes above 100 °C (212 °F), the water droplets hiss when touching the pan and these droplets evaporate quickly. Later, as the temperature exceeds the droplet point, the Leidenfrost effect comes into play. On contact with the pan, the water droplets bunch up into small balls of water and skitter around, lasting much longer than when the temperature of the pan was lower. This effect works until a much higher temperature causes any further drops of water to evaporate too quickly to cause this effect.