Planck's constant
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55877 8
Photocell for determining Planck's constant
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558791 8
Holder for photocell
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Interference filter
Extremely narrow-band filter for spectral lines. For insertion in filter wheel with diaphragm (558 792) or holder for interference filters (468 41).
- Filter's diameter: 25 mm
- Holder's diameter: 28 mm
- Precision of medium wavelength: ±2 nm
- Transmission outside the line: < 0.01 %
Kat.-Nr. Medium wavelength Half width Transmission for 468 400 4 644 nm 18 nm 50 % Cd 468 405 4 633 nm 8 nm > 65 % Ne 468 401 4 578 nm 10 nm > 50 % Hg 468 402 4 546 nm 10 nm > 54 % Hg 468 403 4 436 nm 8 nm > 40 % Hg 468 404 4 405 nm 11 nm > 30 % Hg 468 406 4 365 nm 13 nm 40 % Hg -
46841 8
Holder for interference filters
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558792 8
Filter wheel with diaphragm
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55879
Compact arrangement for determining Planck's constant
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