Balmer Series and Rydberg Constant
SPECIFICATION
• Scale : Brass,
• Dia. 175mm.
• Objective : Achromatic lens,
• f = 178mm,
• Aperture 32mm
• Slit : German silver with knurled screw
• Reticle : 90O cross etched on glass
• Least count : 20 seconds
• Eyepiece : 15X,
• Ramsden eyepiece Vernier : 4 verniers (Telescope & Prism table)
• Base : 220mm dia., Aluminium Casting Special features : Spindle & other critical component manufactured on CNC machine.
• Supplied in wooden box. Spectrum tube power supply SW281: Input Voltage : 220V, 50 Hz AC Output Voltage : 0-5000V (open circuit) Overload : 2mA
(Max.) with reset switch Socket : Spring loaded Protection window for tube with red switch for safe operation
• Hydrogen tube SN631: Gas : Hydrogen research grade Violet : 420, 440nm Blue : 490nm Red : 670nm Diffraction grating SL745: Size : 89 X 38 mm Aperture
size : 16 X 9 mm Rulings : 100,300,600 lines/mm
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