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Determining the focal lengths at collecting lenses using Bessel’s method /
Determining the focal lengths at collecting lenses using Bessel’s method

Determining the focal lengths at collecting lenses using Bessel’s method

VP5.1.2.3

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Description

In the Bessel method, experiment P5.1.2.3, the object and the observation screen are set up at a fixed overall distance s apart. Between these points there are two lens positions x₁ and x₂ at which a sharply focused image of the object is produced on the observation screen. From the lens laws, we can derive the following relationship for the focal length

Components of equipment sets

1	45060 4	Lamp housing with cable
1	450511 8	Bulbs 6 V/5 A/30 W, E14, set of 2
1	46020 4	Condenser with diaphragm holder
1	521210 8	Transformer 6/12 V
1	46002 4	Lens in frame, f=50 mm
1	46003 4	Lens in frame, f=100 mm
1	46166 4	Objects for investigating images, pair
1	44153 8	Screen, translucent
1	460310 8	Optical bench, S1 profile, 1 m
2	460311 4	Clamp rider with clamp 45/65
1	460312 4	Clamp rider with clamp 45/35
1	31178 4	Tape measure 2 m / 1 mm

Experiment Instructions

PDF (Experiment description)

P5.1.2.3 Determining the focal lengths at collecting lenses using Bessels method

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Determining the focal lengths at collecting lenses using Bessel’s method

Description

Components of equipment sets

Experiment Instructions

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