Frederiksen
Lens and aperture holder
Lens and aperture holderHolder for loose Ø 50 mm lenses and 50 x 50 mm apertures.
Lens paper
Lens paperUnit: 500 pcs.
Lenses in holder on rod, + 300 mm
Lenses in holder on rod, + 300 mmLenses mounted in a rectangular shielding sheet (100 x 100 mm) with printed focal length. Fitted with a Ø 10 mm steel rod for use with an optical bench.
Lenses in holder with base, – 200 mm
Lenses in holder with base, – 200 mmØ 40 mm lenses mounted in a shielding plate, 80 x120 mm, with a heavy, stable metal base. Focal length engraved on the plate.
Lenses in holder with base, + 200 mm
Lenses in holder with base, + 200 mmØ 40 mm lenses mounted in a shielding plate, 80 x120 mm, with a heavy, stable metal base. Focal length engraved on the plate.
Lenz’s Law kit, U-profile
Lenz’s Law kit, U-profileLenz’s Law is demonstrated in this apparatus by allowing a magnet to roll down a nearly vertical aluminium U-profile.
Lid for calorimeter
Lid for calorimeterThis lid is used together with calorimeter FR-274050, and can be used for e.g. experiment with energy conservation.
Supplied with plug for hole suitable for Pasco sensor or a plug with hole suitable for stick thermometer.
Lid for voltameter
Lid for voltameterThe lid has 2 plastic tubes which are placed over the platinum electrodes of 453000 Voltameter.
Lid with immersion heater
Lid with immersion heaterUsed with 274500 Insulated cups to confirm Joule’s law. Plastic lid with hole for inserting a thermometer. Fitted with 2.2 ohm heating element connected to 2 telephone jack sockets.
Liquid level apparatus
Liquid level apparatusThis device is used to investigate how connected vessels are affected by pressure and density.
Loudspeaker in cabinet 20W
Loudspeaker in cabinet 20W
Loudspeaker on rod, 3 W
Loudspeaker on rod, 3 WUsed with function generator FR-250350 or FR-250310 to generate sound from a point source. With two speakers you can demonstrate interference.
Loudspeaker, two-way
Loudspeaker, two-wayLoudspeaker for experiments with tone, auditory perception and hearing. (For interference experiments, we recommend 250500 Loudspeaker on post instead.) Fitted with safety sockets.
Lung function model
Lung function modelThis user-friendly lung model shows in a very clear way what happens when we breathe in and out.
