Lens - R>0: when center of curvature C is on the...

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Liu UCD Phy9B 07 8 Convex Mirrors Mirror equation still holds, but: now negative Virtual image, always upright
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Liu UCD Phy9B 07 9 Summary: Signs Object height y : + Image height y’ : + upright - inverted Object distance s & Image distance s’ + on the reflecting side - behind the reflecting side Concave mirror: + Convex mirror: R & f - Magnification m= y’/y = - s’/s |m| >1, magnified; |m|<1 shrunk m: + upright; - inverted
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Liu UCD Phy9B 07 10 Example Always draw a ray diagram with 2 or 3 easy-to-draw rays Keep track of signs in mirror equation Compare & see if make sense
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Liu UCD Phy9B 07 11 34-3. Refraction at a Spherical Surface R n n s n s n a b b a = + ' s n s n y y m b a ' ' = = For plane surface, R= 0 ' = + s n s n b a 1 = m s>0: when object is on the incoming side of the surface (real object) s’>0: when image is on the outgoing side of the surface (real image)
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Unformatted text preview: R>0: when center of curvature C is on the outgoing side of the surface Liu UCD Phy9B 07 12 34-4. Thin Lenses f same on both side + for converging lenses- for diverging lenses Liu UCD Phy9B 07 13 Ray Diagram for Thin Lenses Ray 1 goes out from Q parallel to the axis & passes through F 2 . Ray 2 goes through the center of the lens unaffected Ray 3 goes through F 1 and refracts parallel to the axis. Liu UCD Phy9B 07 14 Lensmaker’s Equation . 1 ' 1 1 f s s = + ) 1 1 )( 1 ( 1 2 1 R R n f − − = s s y y m ' ' − = = Lensmaker’s equation Example: n=1.52 Double convex, radius is 20cm, f ? Double concave? Object-image relation Liu UCD Phy9B 07 15 Ch 34-5 - 7. Optical Instruments Please read text on your own....
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This note was uploaded on 02/17/2009 for the course PHY na taught by Professor Richardscalettar during the Spring '09 term at UC Davis.

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Lens - R>0: when center of curvature C is on the...

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