Physics
A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will

Remain the same
First rise and then fall
Fall
Rise

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Physics
The blue colour of sky is due to

Scattering of shorter wavelengths of sunlight in the atmosphere
Scattering of longer wavelengths of sunlight in the atmosphere
Refraction of sunlight
Reflection of sunlight

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Physics
Rainbows are produced when sunlight :

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
None of the given statements is correct.

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