Cilia are slender, microscopic, hair-like structures or organelles that extend from the surface of nearly all mammalian cells (multiple or single).ource: Amelia Shoemark. ' Motile ' (or moving) cilia are found in the lungs, respiratory tract and middle ear. These cilia have a rhythmic waving or beating motion (see right). They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation.
Share. The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. It ranges in wavelength from approximately 400 nm (4 x 10 -7 m) to 700 nm (7 x 10 -7 m). It is also known as the optical spectrum of light. By Andrew Zimmerman Jones.
Answer by Connor (43). The spectrum is infinite-a photon of higher energy can always be created. Visible light ranges from about 400 to 800 nanometers, however, and most (60% +) of the radiation coming from the sun is in the visible spectrum.he visible light spectrum is about 3.5 x 10^{-26}% of the electromagnetic spectrum. The rest of the spectrum consists of other types of electromagnetic radiation like infrared and radio frequency radiation (on the low end) and gamma rays and x-rays (on the high end).