To be considered as open source software by the software development industry, certain criteria must be met: The program must be freely distributed (It can be part of a package that is sold though, such as Red Hat has done with Linux in the example below).
The term broad-spectrum antibiotic refers to an antibiotic that acts against a wide range of disease-causing bacteria. A broad-spectrum antibiotic acts against both Gram-positive and Gram-negative bacteria, in contrast to a narrow-spectrum antibiotic, which is effective against specific families of bacteria. An example of a commonly used broad-spectrum antibiotic is ampicillin.
An absorption spectrum is a diagram depicting the wavelengths of electromagnetic radiation absorbed by a material, usually a gas. It can be regarded as the opposite to an emission spectrum, which is a depiction of the specific wavelengths emitted by a material. [www.bio-medicine.org/biology-definition/Absorption_spectrum/] absorption spectrum Graph of absorbance values for different wavelengths of light.