rey diagrams for thin lenses

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REY DIAGRAMS for THIN LENSES This is an example how teacher make presentation for students learning “REY DIAGRAMS” : 1. Evaluation students knowledge: • Various lens shapes. Converging and diverging lens. (Slide 2) • Focal point. Students now answer. (Slides 3,4) 2. Easy problem: We have thin lens and an object. Where is the image located? Teacher to lead, adding questions for students, discuss. (Slide and animation 6) 3. Experiment: Problem, students answer, computers answer. (Slide 7) 4. A few groups take a (simple) question. (Slides 8,9) 5. An answer. (Slide 10)

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REY DIAGRAMS for THIN LENSES. This is an example how teacher make presentation for students learning “REY DIAGRAMS” : Evaluation students knowledge: Various lens shapes. Converging and diverging lens. (Slide 2) Focal point. Students now answer. (Slides 3,4) Easy problem: - PowerPoint PPT Presentation

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Page 1: REY DIAGRAMS for THIN LENSES

REY DIAGRAMS for THIN LENSES

This is an example how teacher make presentation for students learning “REY DIAGRAMS” :

1. Evaluation students knowledge:• Various lens shapes. Converging and diverging lens. (Slide 2)

• Focal point. Students now answer. (Slides 3,4)

2. Easy problem:

We have thin lens and an object. Where is the image located? Teacher to lead, adding questions for students, discuss. (Slide and animation 6)

3. Experiment:

Problem, students answer, computers answer. (Slide 7)

4. A few groups take a (simple) question. (Slides 8,9)

5. An answer. (Slide 10)

Page 2: REY DIAGRAMS for THIN LENSES

Biconcave, plano-concave, convex-concave

Biconvex, plano-convex, concave-convex

Various thin lens shapes(nlens>nmedium):

1. Converging lenses, 2. Focal length>0,3. Thickest at the middle

1. Diverging lenses, 2. Focal length < 0,3. Thickest at the edges

Page 3: REY DIAGRAMS for THIN LENSES

Focal point

FOCAL POINT CONVERGING LENS

HOW DOES RAYS DIRECTION AFTER REFRACTING ?

Page 4: REY DIAGRAMS for THIN LENSES

Focal point

FOCAL POINT DIVERGING LENS

HOW DOES RAY TRACING AFTER REFRACTING AT THE LENS ?

Page 5: REY DIAGRAMS for THIN LENSES

R1Object

Image

f

lp

f

F1 F2

flp

111

21

11)1(

1

RRn

fGlass, n>1

Vakuum, n=1

C2

C1

- R2

Geometry for a thin lens

Page 6: REY DIAGRAMS for THIN LENSES

2f f f 2f

Object

Image

Page 7: REY DIAGRAMS for THIN LENSES

2f f f 2f

Object

Image

Eksperiment

Page 8: REY DIAGRAMS for THIN LENSES

2f f f 2f

Object

Group 1 2 3

ObjectObject

T

6

Draw rays diagram and Image

Page 9: REY DIAGRAMS for THIN LENSES

(2f) F2 F1 (2f)

Group 4 5

ObjectObject

Page 10: REY DIAGRAMS for THIN LENSES

2f f f 2f

Group

T

6

A

T’

An answer…Author:Branislav JovanovicKragujevacE-mail: [email protected]: WINDOWS XP

Object(Point) Image(Point)

mailto:[email protected]

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