Spectrometer - Advanced
Product Code : EL-W-11185
Quick Answer: The Spectrometer - Advanced measures the angles at which light is turned by a prism or diffraction grating, using a 177 mm fixed circle read to 30 seconds of arc by double-ended verniers.
Last updated: October 2026
Key Features
- 177 mm diameter fixed circle, with table and telescope movements independent of each other
- Fine adjustment screws on both rotations; releasing a clamping screw allows coarse adjustment by hand
- Collimator on a fixed pillar with a 6 mm long, unilaterally adjustable slit
- Telescope on a moveable pillar with a x15 Ramsden eyepiece and cross line graticule
- Rack and pinion focusing on both telescope and collimator
- Prism table with interchangeable clamping units for a prism and a diffraction grating
Technical Specifications
| Specification | Value |
|---|---|
| Circle diameter | 177 mm |
| Vernier reading | 30 sec. of arc |
| Objectives | 178 mm focus achromatic, 32 mm clear aperture |
| Collimator slit | Unilaterally adjustable, 6 mm long |
| Eyepiece | x15 Ramsden, cross line graticule |
| Focusing | Rack and pinion |
About This Product
Light passing through a prism or diffraction grating is spread into a spectrum, and measuring the angle for each wavelength gives a precise spectrum. Missing lines, an absorption spectrum, reveal the composition of a body that does not emit its own light. The prism table carries lines for placing the prism with respect to its levelling screws. Combined with a Spectrum Lamp, the instrument is used to teach this area of physics.
Frequently Asked Questions
Q1. What accessories come with the Spectrometer - Advanced?
A diffraction grating holder, a watchmaker's eyeglass, a dense flint glass prism, a prism clamp, a tommy bar for adjusting the optical axes and a polished hardwood case.
Q2. How finely can the angles be read?
Both the table and telescope movements can be read to 30 seconds of arc using double-ended verniers on the 177 mm circle.
Related: Waves, Spectrum Tube - Mercury Vapour, Spectrum Tube Holder, with Power Supply.
For a quotation on the Spectrometer - Advanced, contact School Equipments India.
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