Question

Difference between
Lens and mirror
Class 7

Answer 1

• Mirrors are devices which are based on the principle of reflection whereas lenses are devices which are based on the theory of refraction.

• Material other than glass or clear plastic is required to manufacture mirrors, whereas lenses only require glass or clear plastic.

• A perfect mirror reflects 100% of light incident on it from the silvered surface. A perfect lens refracts 100% incident on it.

• There are only three main types of mirrors, whereas there are six main types of lenses.

Answer 2

Lenses have two focal points, one on either side of the lens. A concave mirror converges light to a focal point. For lenses, light converges to a point for a convex lens. A convex mirror diverges light, as does a concave lens.

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