Spectrometer Prism

A spectrometer prism separates light into its component colours (spectrum) based on wavelengths, aiding in the analysis of light properties.
It comes in two sizes, 25mm and 32mm. Three variety Crown, D.F and E.D.F.
Light refracts when passing through the prism, bending at different angles depending on its wavelength, allowing for wavelength measurement.

Component/Feature	Specification
Size/Scale Diameter	6 inches (150 mm) or 7 inches (175 mm/178 mm)
Vernier Reading	1 minute of arc (30 seconds also common)
Main Scale	0-360° with divisions of (0.5 circ ) (150 mm or 175 mm circle)
Vernier Scale	Double ended vernier separated by (180 circ )
Collimator Lens	Achromatic, 178 mm focus, 32 mm clear aperture
Telescope Lens	Achromatic, 178 mm focus, 32 mm clear aperture
Eyepiece	Ramsden Type ((10 times ) or (15 times ) with cross-line graticule
Slit	Unilaterally adjustable, 6mm long
Fine Adjustment	Provided for both telescope and collimator (laterally and vertically)
Prism Table	Marked with lines; leveling screws & interchangeable clamp
Main Structure	Heavy cast metal with bright plated fittings (sometimes stainless steel scale)
Accessories	Prism holder, Grating holder, Watchmaker’s eyeglass, L-key, Hardwood case

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