Lenses Physics Mrs Coyle What phenomenon is evident

Lenses Physics Mrs. Coyle

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 • Enlarged or • Erect or Virtual Reduced 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 + converging lens (convex) f - diverging lens (concave)

Magnification M = hi = -di ho do Note: When magnification is <0, the image is inverted.

Lens Equation 1 = 1 + 1 f do 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