Beam Instruments

Some articles on beam:

Spectrophotometry - Design
... There are two major classes of devices single beam and double beam ... A double beam spectrophotometer compares the light intensity between two light paths, one path containing a reference sample and the other the test sample ... A single beam spectrophotometer measures the relative light intensity of the beam before and after a test sample is inserted ...

Famous quotes containing the words instruments and/or beam:

    But when to mischiefmortals bend their will,
    How soon they find fit instruments of ill!
    Alexander Pope (1688–1744)

    How can one beam alone support a house?
    Chinese proverb.