Wavelength of Na & Hg light using Grating

Product Description

Experiments: To verify the quantum nature of the Balmer series, specifically for atomic hydrogen, using sodium as a calibration source

APPARATUS USED

1. SPECTROMETER

Base : painted base with 3 leveling screws.

Scale : circular scale is graduated 360' in half degrees & is attached to the arm with telescope ,so that it moves when telescope is moved.

Vernier : 30 or 60 divisions of Vernier coincide with 29 (or 59) divisions of the main circular divisions.

Collimator : This horizontal tube has an achromatic lens( 7” F.L.) at one end and a sliding tube with on adjustable vertical slit at the other. The distance between the lens & slit can be changed by a rack & pinion for obtaining parallel rays.

Slit : consists of two sharp edges; one fixed while the other can be moved by a screw provided.

Telescope : it is an astronomical telescope with an achromatic objective of 7” F.L. And a Ramsden's eye piece. 

Prism Table : two circular plates separated by 3 springs having leveling screws. Its height can be adjusted by a screw on its side. On its top a grating holder & prism holder is mounted.

Vernier : 60/30sec.

SIZE : 6” prism stand, grating holder

2. PRISM 32 X 32 MM DF

3. Mercury Vapour Lamp 80 watt with choke & wooden box having slits fitted.

4. Diffraction Grating 15000 lines/inch

5. Sodium Vapour lamp 35 watt , box and transformeter 

FEATURES

  • Spectrometer 6 inch
  • Prism 32 x 32 mm DF 
  • Diffraction Grating 15000 lines/inch 
  • Sodium vapour lamp +Box+Transformer
  • Mercury Vapour Lamp with choke & box 80 W

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Wavelength of Na & Hg light using Grating

Wavelength of Na & Hg light using Grating

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