Radiation

2 March 2010

Elecromagnetic Spectra, EMR

The entire range over which the electromagnetic radiation exists is known as electromagnetic spectrum. This electromagnetic spectrum ranges from very short wavelengths (including gamma and x-rays) to very long wavelengths (including microwaves and broadcast radio waves). The following chart displays many of the important regions of this spectrum.
2 March 2010

Instrumentation of UV or Visible Spectroscopy

INSTRUMENTATION

Instruments for measuring the absorption of U.V. or visible radiation are made up of the following components;
1. Sources (UV and visible)
2. filter or monochromator
3. Sample containers or sample cells
4. Detector

1. Radiation source
It is important that the power of the radiation source does not change abruptly over its wavelength range.