Physics Lab Equipment

LEOI-96 Kirchhoff Bunsen Spectroscope.png

Schematic of Kirchhoff Bunsen spectroscope

1. Prism chamber, 2. Drum calibrated in wavelength, 3. Wavelength scale adjust screw, 4. Collimator, 5. Narrow slit, 6. Plane mirror, 7. Right angle prism, 8. Slit width adjust screw, 9. Post, 10. Base, 11. Supporting stage, 12. handwheel, 13. Plate holder, 14. Eyepiece, 15. Telescope


LEOI-96 Kirchhoff Bunsen Spectroscope.png

Wavelength scale

LEOI-96 Kirchhoff Bunsen Spectroscope

LEOI-96 Kirchhoff Bunsen Spectroscope

Introduction

This basic spectrometer is an experimental instrument, consisting of collimator, telescope, prism, wavelength calibrated drum, and stand. It provides a high quality optical system and an easy-to- read scale, allowing to measure discrete atomic spectral lines. It can be used to illustrate the construction of a spectroscope, observe and measure the wavelengths of spectral lines, and verify the Planck's constant.


Specifications

Wavelength range400 ~ 800 nm
Collimator focal lengthObjective: 150 mm


Telescope focal length

Objective: 150 mm
Eyepiece: 25 mm (low power); 12.5 mm (high power)
Wavelength calibrated drumObjective focal length 100 mm



Measurement error

400 - 500 nm: 2 nm
500 - 600 nm: 5 nm
600 - 700 nm: 10 nm
700 - 800 nm: 20 nm


Prism

Angle 60°
Side length: > 32 mm


Resolving power

Mercury doublet 577 nm and 579 nm using low-power eyepiece
Sodium doublet 589 nm and 589.6 nm using high-power eyepiece
Dispersion powerAverage line dispersion power is less than 24.7 nm/mm


LEOI-96 Kirchhoff Bunsen Spectroscope.png

Schematic of Kirchhoff Bunsen spectroscope

1. Prism chamber, 2. Drum calibrated in wavelength, 3. Wavelength scale adjust screw, 4. Collimator, 5. Narrow slit, 6. Plane mirror, 7. Right angle prism, 8. Slit width adjust screw, 9. Post, 10. Base, 11. Supporting stage, 12. handwheel, 13. Plate holder, 14. Eyepiece, 15. Telescope


LEOI-96 Kirchhoff Bunsen Spectroscope.png

Wavelength scale

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