focal point
concave mirror are the best as it collects the sunlight coming from infinity to a single point called focus.it produces intense heat to cook food easily.still using plane mirror on household level for solar cooker is foolishness.
parabolic cooker.
A parabola solar cooker works the best and fastest
A solar cooker and a pressure cooker are two completely different ways of cooking. A pressure cooker can still use a heat source like a gas or electric cook top. A solar cooker is as the mercy of the heat of the sun and the contents will only cook as well as the amount of heat it obtains.
A panel cooker is a way of using solar power to cook an item. The advantage of using a panel cooker is that it is using solar energy and not electricity.
horace de saussure invented the first solar cooker bout the year 1797
Solar is a device which Run from sunlight
Functions of a solar heater
It's called "the sun".
because he did not have stoves back then so he made a solar cooker to heat his food up
The Sun is at the center of the Solar System. the SUN is the centre of our solar system.
john bohmer