Explain the principles and working of solar cooker. Also highlight its features over conventional cooker.

Solar cookers harness the energy of sunlight to cook food without the need for conventional fuel sources such as gas or electricity. They work on the principle of converting solar radiation into heat energy, which is then used for cooking. There are several types of solar cookers, but they all generally operate based on the same basic principles.

The working of a solar cooker involves the following steps:

1. Solar Energy Absorption: Solar cookers consist of a reflective surface or material that concentrates sunlight onto a cooking vessel or container. This reflective surface can be made of mirrors, aluminum foil, or other reflective materials. The concentrated sunlight is absorbed by the cooking vessel, which converts it into heat energy.

2. Heat Retention: Once absorbed, the heat energy is retained within the cooking vessel, creating a high temperature environment suitable for cooking food. Some solar cookers also incorporate insulation materials to further enhance heat retention and cooking efficiency.

3. Cooking Process: The food to be cooked is placed inside the cooking vessel, which is then covered or sealed to trap the heat inside. The intense heat generated by the concentrated sunlight cooks the food gradually over time, similar to a conventional oven or stove.

Features of solar cookers over conventional cookers:

1. Environmentally Friendly: Solar cookers utilize renewable solar energy, reducing reliance on fossil fuels and minimizing carbon emissions. They are environmentally friendly alternatives to conventional cookers, contributing to sustainability and mitigating climate change.

2. Cost Savings: Solar cookers eliminate the need for expensive fuels such as gas or electricity, resulting in significant cost savings over time. Once purchased, solar cookers have minimal operating costs, making them economically advantageous, especially in regions with abundant sunlight.

3. Safety: Solar cookers pose fewer safety hazards compared to conventional cookers fueled by gas or electricity. There is no risk of fire or gas leakage, making solar cookers safer for both users and the environment, particularly in households with children or elderly individuals.

4. Versatility: Solar cookers can be used for various cooking methods, including boiling, steaming, baking, and roasting. They are suitable for preparing a wide range of dishes, making them versatile appliances for diverse culinary needs.

5. Accessibility: Solar cookers are particularly beneficial in off-grid or remote areas where access to conventional energy sources may be limited or unreliable. They provide a viable cooking solution for communities without access to electricity or gas infrastructure.

In summary, solar cookers harness the power of sunlight to cook food efficiently and sustainably, offering several advantages over conventional cookers, including environmental friendliness, cost savings, safety, versatility, and accessibility. As technology continues to advance, solar cookers are becoming increasingly popular as a practical and eco-friendly cooking solution worldwide.