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L6-38. Coma
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L6-38. Coma
Purpose
To illustrate coma.
Equipment
Bright point source, front-surface plane mirror, light screen with iris, large 20 cm focal length convex lens, and second iris, all on optical rail rolling table.
Setup Time
5 minutes.
Images
Description
The filament of a bright point source (about 3x6 mm) is focused onto a distant screen using a 20 cm focal l front-surface mirror is used to direct a bundle of non-paraxial rays through the lens, producing the image at the left above, which displays coma. The large baffle before the large 20cm lens and the iris following the lens limit stray light so that the two images are clearly differentiated.
References
(PIRA 6A65.31)
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
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See pagesl3. curved mirrors
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See pagesl4. refraction
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See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
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See pagesl3. curved mirrors
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See pagesl4. refraction
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See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments
Physics Lab Demos