This experiment on diffraction at an optical grating not only provides convincing proof of the ability of (visible) light to undergo interference, and hence of its wave character; but it is also well suited to determine the wavelength of selected colours of the spectrum.
Principle
This experiment on diffraction at an optical grating not only provides convincing proof of the ability of (visible) light to undergo interference, and hence of its wave character; but it is also well suited to determine the wavelength of selected colours of the spectrum. Moreover, it is sure to motivate students who will be impressed by the ability to determine with simple means such small physical quantities as the wavelength of light.
Benefits
Tasks
Produce a diffraction spectrum using an optical grating and determine the wavelengths of red and green light.
Device name | Article no. | Quantity |
---|---|---|
Light box, halogen 12V/20 W | 09801-00 | 1 |
Bottom with stem for light box | 09802-20 | 1 |
Optical profile-bench for student experiments, l = 600 mm | 08376-00 | 1 |
Colour filter set, additive (red, blue, green) | 09807-00 | 1 |
Lens on slide mount, f=+50mm | 09820-01 | 1 |
Lens on slide mount, f=+100mm | 09820-02 | 1 |
Diaphragm with slit | 09816-02 | 1 |
Slide mount for optical bench | 09822-00 | 1 |
Mount with scale on slide mount | 09823-00 | 1 |
Screen, white, 150×150 mm | 09826-00 | 1 |
Diaphragm holder, attachable | 11604-09 | 2 |
PHYWE Power supply, 230 V,DC: 0…12 V, 2 A / AC: 6 V, 12 V, 5 A | 13506-93 | 1 |
Grating, 80 lines/mm | 09827-00 | 1 |
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