5-Physics-Wave-Superposition-Reflection-Mirror

curved mirror

Curved mirrors {curved mirror} focus incoming parallel light rays onto point {focus, mirror}.

types

Curved mirrors {spherical mirror} can have constant radius. Spherical mirrors {convex mirror} can curve out. Curvature radius is positive if curve is convex. For convex mirrors, image is always virtual and erect. For convex mirrors, if object is inside focal point, image is bigger. For convex mirrors, if object is outside focal point, image is smaller.

Spherical mirrors {concave mirror} can curve in. Curvature radius is negative if curve is concave. For concave mirrors, if object is outside focal point, image is real and inverted. For concave mirrors, if object is inside focal point, image is virtual, erect, and bigger.

Curved mirrors {parabolic mirror} can have changing radius.

magnification

Ratio of image size I to object size O equals ratio of distance q of image from mirror to distance p of object from mirror: I/O = q/p.

focal length

Focal length F is spherical-mirror curvature radius R divided by two: F = R/2.

lens equation for mirrors

Image distance I and object distance O relate to focal point distance F {lens equation, mirror}: 1/F = 1/I + 1/O.

method of rays

Find object image using incoming straight lines from object and outgoing straight lines to image {method of rays} {rays method}, which reflect from spherical mirror points.

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Date Modified: 2022.0225