Mirror used in solar furnace:

• A. Concave mirror
• B. Convex mirror
• C. Parabolic mirror
• D. Bi concave mirror

In a solar furnace, the type of mirror that is most effective is the parabolic mirror. This mirror is designed to focus sunlight onto a single point, which allows for the concentration of heat and energy. Here’s a brief overview of the different types of mirrors mentioned:

Types of Mirrors

• Concave Mirror: Curved inward, it can focus light but is not as efficient as a parabolic mirror for solar applications.
• Convex Mirror: Curved outward, it diverges light and is not suitable for focusing sunlight.
• Parabolic Mirror: Specifically designed to focus parallel rays of light to a single focal point, making it ideal for solar furnaces.
• Bi-Concave Mirror: This type diverges light and is not used for concentrating sunlight.

In summary, the parabolic mirror is the best choice for solar furnaces due to its ability to efficiently concentrate solar energy.