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L6-35. Chromatic Aberration - Point Source And 20 Cm Lens

Purpose

To show the effect of chromatic aberration in a lens.

Equipment

Bright point source with condenser lens, adjustable slit, 20cm simple lens, 20cm achromatic lens, and small screen on optical bench with extension rail.

Setup Time

5 minutes.

Images

l6-35

Description

Two 20cm convex lenses are available: a simple spherical lens and an achromat. The point source is focused onto a slit, which in turn is imaged by the lens on a distant screen. The screen is rotated as shown to increase the dispersion at the image. The achromat has virtually no chromatic aberration compared with the simple lens.

References

(PIRA 6A65.20)

L. Geometrical Optics

L. Geometrical Optics

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