Holmarc’s Spectrometer Goniometer (Model No: HO-ED-S-02) is designed as a versatile instrument suitable for precise determination of the optical parameters of prisms and gratings. It can also be used as a spectroscope, for qualitative examination and measurement of emission and absorption spectra. This system consists a mercury lamp with power supply and also includes prism with holder and transmission grating with holder.
The collimator and the telescope have a focal length of 202 mm and a diameter of 32mm. The collimator tube has an adjustable slit.
Determine the refractive index of a glass prism
Demonstrate the relationship between refractive index and wavelength (dispersion curve)
Calculate the resolving power of the glass prism from the slope of the dispersion curves
Determine the wavelengths of the mercury spectral lines
Determine the grating constant of a diffraction grating based on the diffraction angle of the high intensity spectral lines of mercury
Determine the angular dispersion of a grating
Calculate the resolving power required to separate the different Hg-Lines