Spherical lenses and mirrors have curved surfaces. Lenses can be converging (convex) or diverging (concave), affecting light focus. Mirrors, concave or convex, influence reflection properties, used in optics for various applications.
Both a spherical mirror and a thin spherical lens have a focal length of (-)15 cm. What type of mirror and lens are these?
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Both are concave. A concave mirror and a concave lens both have a focal length with a negative sign. Therefore, a spherical mirror with a focal length of (-)15 cm is a concave mirror. Similarly, a thin spherical lens with a focal length of (-)15 cm is a concave lens.
In the context of mirrors and lenses:
• For mirrors, positive focal lengths are associated with convex mirrors, while negative focal lengths are associated with concave mirrors.
• For lenses, positive focal lengths are associated with converging lenses (convex lenses), while negative focal lengths are associated with diverging lenses (concave lenses).
• Alternative, answer that should be given credit: Plano-concave lens