Archive
7th of September 2015
Physics
Q:

explain me function of solar cooker?types of mirrors use.

Shubham Chauhan - CBSE - Class X

Monday, September 07, 2015 at 18:30:PM

A:

Hi Shubham,

Solar cooker: It consists of a rectangular metallic, double-walled box. A thermal-insulating material such as glass wool is filled between the two walls of the box in which the inner surface of the wall is painted black and has a glass or plastic cover at the top. 

The sunlight is reflected from a plane mirror where the food to be cooked is kept in the shallow vessels. The black surface of the vessel absorbs 98% of the incident heat radiation.

A concave mirror can also be used in a solar cooker because it reflects and focuses the sunlight at a point. and the temperature at that point increases which heats and cooks the food placed at that point.

 

Monday, September 07, 2015 at 19:00:PM