Question

In places with a hot climate, it is advised to paint the outer walls of houses with white paint. Why?

• A. White colour transfers most of the heat that falls on it to another body
• B. White colour reflects most of the heat that falls on it
• C. White colour refracts most of the heat that falls on it
• D. White colour absorbs most of the heat that falls on it

Answer 1

The correct option is B White colour reflects most of the heat that falls on it

When sun-rays fall on objects, the objects get heated up by different amounts. Some of them are hotter since they absorb more heat than the others. It has been found that dark coloured objects are better absorbers and transmitters of heat. In places where the weather is hot, it is advised that the outer walls of houses should be painted white because light colour reflects most of the heat that falls on it. Therefore, the temperature inside the house does not increase much.