A magnifying glass (called a hand lens in laboratory contexts) is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle (see image). A magnifying glass can be used to focus light, such as to concentrate the sun's radiation to create a hot spot at the focus for fire starting.
Focused light can burn things.
( z1 possible :ARG1 ( z2 burn :ARG0 ( z3 light :ARG1-of ( z4 focus ) ) :ARG1 ( z5 thing ) ) )