Curved Mirrors: Concave Applied Physics and Chemistry Reflection Lecture 2
Optics: Reflection, Refraction 05/25/2006 Curved mirrors What if the mirror isn’t flat? light still follows the same rules, with local surface normal Parabolic mirrors have exact focus spherical mirrors may experience distortion used in telescopes, backyard satellite dishes, etc. also forms virtual image education.jlab.org/powerpoint/0708_optics_mirrors_and_lenses.ppt Lecture 16
View kacleaveland's map "Have you ever approached a giant concave mirror? See your upside-down image suspended in mid-air. Walk through the image to see a new reflection, right-side-up and greatly magnified. In the background you see reflected a room full of visitors enjoying other Taken in a place with no name (See more photos or videos here) View kacleaveland's map Concave Mirrors Curve inward May be real or virtual image education.jlab.org/powerpoint/0708_optics_mirrors_and_lenses.ppt
Concave Mirror The center C of a concave mirror is outside the mirror. Focal point F is also outside the mirror, half way between the center and the surface of the mirror. The focal length f is half of the radius of curvature. www.physics.umd.edu/courses/Phys106/FL11.ppt
Image from a concave mirror: case 1 Step 1 Step 2 Step 3 Step 4 www.physics.umd.edu/courses/Phys106/FL11.ppt
Image from a concave mirror: case 1 www.physics.umd.edu/courses/Phys106/FL11.ppt
Properties of the Image If we put an object outside of the center of a concave mirror, we find the image is Real, in the sense that all light rays pass through the image. Inverted, in the sense that the direction of the arrow has been changed. The image is smaller! www.physics.umd.edu/courses/Phys106/FL11.ppt
Animation for case 1 www.physics.umd.edu/courses/Phys106/FL11.ppt
Image for a concave mirror: case 2 www.physics.umd.edu/courses/Phys106/FL11.ppt
If the object is in between the center and the focal point, the image is Real Inverted Magnified in the sense that the image is bigger than the real object. www.physics.umd.edu/courses/Phys106/FL11.ppt
Animation for case 2 www.physics.umd.edu/courses/Phys106/FL11.ppt
Image from a concave mirror: case 3 www.physics.umd.edu/courses/Phys106/FL11.ppt
Image from a concave mirror: case 3 www.physics.umd.edu/courses/Phys106/FL11.ppt
Animation for case 3 www.physics.umd.edu/courses/Phys106/FL11.ppt
Properties of the image If the object is closer to the mirror than the focal point F, the image is Virtual, it is behind the mirror Upright, not inverted Magnified www.physics.umd.edu/courses/Phys106/FL11.ppt
Java Applet http://www.microscopy.fsu.edu/primer/java/mirrors/concave.html