Table of Contents
What are the properties and uses of visible light?
One of the properties of visible light is the presence of dark absorption lines in the visible light spectrum. These lines serve as markers for missing wavelengths. Scientists use these patterns to study the makeup of stars, as missing wavelengths correspond to certain elements.
What is the use of visible spectrum?
Visible-light spectroscopy is an important tool in astronomy (as is spectroscopy at other wavelengths), where scientists use it to analyze the properties of distant objects. Chemical elements and small molecules can be detected in astronomical objects by observing emission lines and absorption lines.
What is the purpose of light?
Light is the main source of energy for all living organisms. Plants, main sustainers of life, are crucial in this conversion process and need light for photosynthesis that enables them to make their own food and food for others. And, perhaps more importantly, photosynthesis produces oxygen too!
What are the characteristics of visible lights?
Visible light is made up of photons of different wavelengths ranging from about 400 to 700 nanometers (nm). A nanometer is a billionth of a meter. Each of these different wavelengths corresponds to a different color. We see the longest wavelengths of visible light as red light.
How are visible light used in communication?
The Li-Fi uses visible light for communication to provide high speed internet up to 10Gbits/s. Visible light is used to provide both lighting and information using VLC techniques. For example, we use lighting in the room to provide the room number identification and other information about the building.
How is visible light used in medicine?
Sources of visible light are lasers, LEDs and fluorescent lamps which have the full range of a visible light. Phototherapy is used in the treatment of acne vulgaris, seasonal affective disorders, depression, psoriasis, eczema and neurodermities. Photodynamic therapy is used in the treatment of cancer as well.