What is the intial source of energy in a 1.5v battery.

The simplest cells are made up of plates of two different kinds of metal, which are kept in salty or acid liquid. When a wire connects the two plates, electrical current flows between them.

Explanation:

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

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