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Curved Mirrors: Concave

Curved Mirrors: Concave. Applied Physics and Chemistry Reflection Lecture 2. 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

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Curved Mirrors: Concave

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  1. Curved Mirrors: Concave Applied Physics and Chemistry Reflection Lecture 2

  2. 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

  3. View kacleaveland's map Taken in a place with no name (See more photos or videos here) "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 Concave Mirrors • Curve inward • May be real or virtual image education.jlab.org/powerpoint/0708_optics_mirrors_and_lenses.ppt

  4. Concave Mirror • The centerC of a concave mirror is outside the mirror. • Focal pointF is also outside the mirror, half way between the center and the surface of the mirror. • The focal lengthfis half of the radius of curvature. www.physics.umd.edu/courses/Phys106/FL11.ppt

  5. Image from a concave mirror: case 1 Step 1 Step 2 Step 3 Step 4 www.physics.umd.edu/courses/Phys106/FL11.ppt

  6. Image from a concave mirror:case 1 www.physics.umd.edu/courses/Phys106/FL11.ppt

  7. 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

  8. Animation for case 1 www.physics.umd.edu/courses/Phys106/FL11.ppt

  9. Image for a concave mirror: case 2 www.physics.umd.edu/courses/Phys106/FL11.ppt

  10. 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

  11. Animation for case 2 www.physics.umd.edu/courses/Phys106/FL11.ppt

  12. Image from a concave mirror: case 3 www.physics.umd.edu/courses/Phys106/FL11.ppt

  13. Image from a concave mirror: case 3 www.physics.umd.edu/courses/Phys106/FL11.ppt

  14. Animation for case 3 www.physics.umd.edu/courses/Phys106/FL11.ppt

  15. 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

  16. Java Applet • http://www.microscopy.fsu.edu/primer/java/mirrors/concave.html

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