Hydrogen spectrum & Rydberg constant
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Laser
Type: Helium Neon discharge tube Laser
Wavelength: 650 nm
Output power: 2 mW (LDV-201/44A)
Output power: 5 mW (LDV-501/44B)
Mount: Free standing with tilt adjustable +10° (LDV-201/44A)
Mount: Free standing with height adjustable (LDV-501/44B)
Power supply
Rated Input: 220 V/50 Hz or 110 V/60 Hz
Mains cord: 3 pin
Discharge tube voltage: 5000 V