Lenses Physics Mr Berman What phenomenon is evident
Lenses Physics Mr. Berman
What phenomenon is evident in lenses? https: //wiki. brown. edu/confluence/display/Physics. Labs/PHYS+0080+BC
Basic Types of Lenses • Convex • Concave
Convex Lens http: //www. shokabo. co. jp/sp_e/optical/labo/lens
Concave Lens http: //www. shokabo. co. jp/sp_e/optical/labo/lens. h
Type of Image • Real or Virtual • Enlarged or Reduced • Erect or Inverted
Convex Lens f Center C
Ray Diagram for Convex Lens Principal Axis http: //facstaff. gpc. edu/~pgore/Physical. Science/ray_diagram_sample. jpg
Rules for Ray Diagrams for Convex Lens • A parallel ray refracts through the focal point. • A ray through the center of the lens continues straight. • A ray coming through the focal point, refracts parallel to the principal axis.
• http: //higheredbcs. wiley. com/legacy/colleg e/halliday/0471320005/simulations 6 e/inde x. htm? newwindow=true
Summary for Convex Lens When the object is: • Beyond 2 F Then the image is: • Between 2 F and F • At 2 F • Between 2 F and F • Beyond 2 F • At F • No image • Between F and lens • Virtual image
Sign Convention do + object distance di + real image, other side of lens di - virtual image, same side as object hi + erect image hi - inverted image f f + converging lens (convex) - diverging lens (concave)
Magnification M = hi ho = -di do Note: When magnification is <0, the image is inverted.
Lens Equation 1=1+1 f d o di
Concave Lens Object Image
Summary for Concave Lens Always: • Virtual, reduced, upright image
• http: //bcs. wiley. com/hebcs/Books? action=resource&bcs. Id=1074& item. Id=0471320005&resource. Id=169
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