Question

Why do people blow air on their spectacles before cleaning them?

• A. The cold air from the mouth helps in better cleaning
• B. It makes the spectacles more shiny
• C. The warm air converts into droplets which helps in better cleaning
• D. Blowing on spectacles helps in better eyesight

Answer 1

The correct option is C The warm air converts into droplets which helps in better cleaning

People blow air onto the spectacles to clean them. The moisture from the air blown gets converted into droplets of water on the glass and hence can clean the spectacles.