Teal & White Ribbon: Cervical Cancer. Rainbow Ribbon: Adrenocortical carcinoma, Gay Pride, Same Sex Marriage. Black & Pink Ribbon: Loss of a Sister, Loss of a female child, mourning a sister, mourning a daughter. Black & Blue Ribbon: Loss of a Brother, Loss of a male child, mourning a brother, mourning a son.
Electromagnetic spectrum refers to the full range of all frequencies of electromagnetic radiation and also to the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. Devices used to measure an electromagnetic spectrum are called spectrograph or spectrometer.
Low energy photons (such as radio photons) behave more like waves, while higher energy photons (such as X-rays) behave more like particles. The electromagnetic spectrum can be expressed in terms of energy, wavelength or frequency. Each way of thinking about the EM spectrum is related to the others in a precise mathematical way. Scientists represent wavelength and frequency by the Greek letters lambda (Î») and nu (Î½).