摘要:

Partially covering a converging lens can produce either vignetted or dimmed real images, depending on how the image is observed. A field lens captures non-paraxial rays, allowing the dimming effect to be observed directly, without using a screen.

ISSN:0031-921X    

DOI:10.1119/1.880085

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Simple experiments illustrating important physical principles are precious. Here is one showing the ideas of constant acceleration and kinetic friction.

ISSN:0031-921X    

DOI:10.1119/1.880082

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Stare at the center of the picture here while you count slowly to one hundred, then look at a white wall. You will see a startlingly real image of Jesus!

ISSN:0031-921X    

DOI:10.1119/1.1527625

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

ISSN:0031-921X    

DOI:10.1119/1.880086

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

High school physics students learn the vector concept by participating in a “treasure hunt.”

ISSN:0031-921X    

DOI:10.1119/1.880084

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP