Item #: KS 1701
Our Price: $1,285.00
Quantity:
 

Description  more details

The 1701 Spectroscope ( Kirchoff-Bunsen ) is used for qualitative analysis and measurement of emission and absorption spectra. It can be calibrated easily, and both the observation tube and ocular are moveable. Accessories include scale illumination, wavelength scale, spare prism and lamp.

Observation tube: moveable, with lock-screw movable ocular

Ocular 18mm / 90mm

Objective: 18 mm / 160 mm

Slit tube: fixed, with variable slit objective: 18 mm / 160 mm

Scale tube: fixed, with scale of 200 divisions ocular: 18 mm / 90 mm

Flint prism: 60 °, dispersion C-F=2 °, base length 20 mm, height 30 mm

The history of the spectroscope.

Spectroscopes play a vital role in modern analytical science. They having applications in diverse fields such as forensics, quality control, and astronomy. The determination of the presence and concentration of elements within a sample is a mainstay of the modern analytical laboratory, but the spectroscope also played a pivotal role in the very birth of modern science.

One of the first objects to be examined spectroscopically was the Sun, and at the beginning of the 19th century, it was first noticed that the rainbow spectrum made famous by Isaac Newton was not, in fact, continuous. The dark bands which we now know as absorption lines were first identified, and named Fraunhofer lines after the German scientist who systematically charted them with his new invention – the spectroscope. His studies led the way to the discovery that each element had a characteristic line or set of lines, and that these could be used to identify an otherwise unknown sample.

The work of many scientists in that century led to the progressive cataloging of the spectra of many elements. A conundrum presented itself with the solar spectral line at 587.49 nanometers which could not be attributed to any known element. The astronomer Norman Lockyer proposed that this must indicate an element unknown on Earth. it was named helium after the Greek word for the sun, helios. Today we know that helium is the second most abundant element in the universe, yet its existence was unknown before the analytical power of the spectroscope.

Reviews

Be the first to submit a review on this product!
Review and Rate this Item

Other Items In This Category

Share







Pin It

Email A Friend

Send your friend a link to this product.