Reference: Lab Experiments Journal vol-11, No.1, Page-45 Lab Experiments Journal vol-15, No.4, Page-278

Resolving power of grating

Experiment(s):

Determination of grating constant and resolving power of grating

Measurement of wavelengths of mercury spectrum

Specifications

1 . Spectrometer

                    Scale: 7" diameter (Brass)
Base: Cast iron with leveling screw
All moving parts made of Brass for accuracy
Collimator with adjustable slit
Horizontal axis alignment for collimator: Yes
Horizontal axis alignment for telescope: Yes
Centre table: Height adjustable  with provision for prism and grating holder
Telescope with user changeable cross wire and eyepiece
                  

2 . Diffraction grating

                    Grating constant: 15000 Lines/inch
Window size: 40 mm x 30 mm
                  

3 . Mercury vapour lamp

                    Bulb: Philips/Osram or equivalent
Power: 160 W
Transformer free operation
Enclosure: Wooden with slits
Rated Input: 220 V/50 Hz or 110 V/60 Hz
                  

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