Question

drops which are formed on the outer surface. what is reason for this

Answer 1

hi friend
here's your answer looking for

you might be wondering when you see some drops on the outer surface of a glass.

so how the drops form?

actually, as there is the cold water in a glass. that is enough to condense the water vapour present in atmosphere.

so, when the air strikes on the surface of glass, then the water vapour that is present in the air or the motion that is present in atmosphere get condense on the outer surface of glass.

and when the water vapour get condensed, then it changes into the water droplets this is liquid state.

that's why you notice water droplets on the outer surface of the glass containing the cold water.

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hope you are satisfied with my answer