Question

You must have seen people blowing out air to clean their glasses. Why glasses become wet when you breathe out air on them ?

Answer 1

Answer:

⚫ As a result, the water vapours present in the air surrounding the glass condense and get attached to the glass surface. ⚫ Consequently, the glass becomes wet. ⚫hence the glass can be wiped properly due to presence of water droplets. ⚫so , people blow air into their spectacles before cleaning them.

Explanation:

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Answer 2

Answer:

The air blown from the mouth is hot and the glass of the spectacles is comparatively colder. The hot air we breathe out contains water vapors which turn into tiny droplets of water when it comes in contact with the colder glass. This makes the glass moist and hazy.