Question

What is fixed at the top of the solar cooker?
(a) Plane mirror or concave mirror
(b) Convex mirror
(c) Bifocal mirror
(d) Cylindrical mirror

Answer 1

Hint: The mirror used to concentrate the solar light to heat the ingredient present inside the cooker. So the mirror which will concentrate all the sunray at a point which will be used in the solar cooker.

Complete step-by-step answer:
Before answering the question let's get to know about a solar cooker. A solar cooker can be assumed as a normal cooker that we use in our kitchen but the difference is that a solar cooker uses the sunlight to give energy to the material inside the cooker. By using a mirror the solar light will reflect from the sun to the cooker.
By using the concave mirror, we can concentrate all the rays at a point coming from the sun. We know that all the rays coming from the sun are coming from infinity so concave mirrors concentrate all the rays at the focal point of the mirror. This concentrated light have very high thermal energy that is used to cook the food present in the cooker
So the answer is option(a).

Additional information:
There are many uses of solar light that is
(1) Absorb the solar light by solar panel to produce electricity. That concept comes under semiconductor.
(2) Solar light is also used in power plants like thermal power plants, nuclear power plants. In those power plant the concave mirror is used to focus all the sunlight at the focal point of that mirror that is, on the pipe of water place so by concentrating light that water will boil, and the steam produced by that boiled water will be used to run the turbine of a power plant to generate electricity by running the generator.

Note: When a student gets any question related to a mirror or lens. Mostly they have to focus on the working of the mirror and lens. They have to better know that which one is converging and which one is diverging. So they will approach the right technique to get the right answer.