"The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye."
Electromagnetic radiation with wavelengths that can be seen by the human eye. It has low penetrating ability and is essential for vision.
Electromagnetic spectrum: The complete range of frequencies of electromagnetic radiation, including visible light.
Properties of light: Characteristics of light, such as wavelength, frequency, amplitude, and speed.
Wave-particle duality: The idea that sometimes light behaves as a wave and sometimes as a particle.
Energy of photons: The relationship between frequency, wavelength and energy of photons of light.
Absorption, reflection, and transmission of light: How different materials react to light hitting them.
Polarization of light: The orientation of electromagnetic waves in a transverse wave.
The human eye and its response to light: Understanding how the eyes process and perceive visible light.
Color perception: The different ways in which humans perceive color, and the science behind color vision.
Sources of light: The different types of sources of light, the characteristics and properties of each type.
Spectroscopy: The study of the interaction between matter and electromagnetic radiation.
Quantization of energy: The idea that energy can only occur in discrete packets.
Radioactivity: The spontaneous emission of particles or radiation from unstable atomic nuclei.
Nuclear decay: The process by which unstable nuclei break down and emit radiation.
Types of radiation: Alpha particles, beta particles, gamma rays, and their properties.
Half-life: The time it takes for half of the mass of a radioactive isotope to decay.
Biological effects of radiation: The potential harm that radiation can cause to living cells and organisms.
Radioactive decay and dating techniques: How decay of radioactive isotopes can be used to measure time and date materials.
Medical uses of radiation: How radiation is used in medicine for diagnosis and treatment of different conditions.
Environmental and industrial applications of radiation: The use of radiation in various industrial processes, and its impact on the environment.
Radiation safety and protection measures: The methods and protocols used to protect people and the environment from harmful radiation exposure.
Gamma rays: A high-energy form of electromagnetic radiation emitted by radioactive decay or nuclear reactions. Gamma rays have the shortest wavelength and highest frequency in the electromagnetic spectrum.
X-rays: A form of electromagnetic radiation with wavelengths shorter than ultraviolet light but longer than gamma rays. X-rays are commonly used in medical imaging.
Ultraviolet (UV) radiation: A form of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. UV radiation can be harmful to living organisms in high doses.
Visible light: The portion of the electromagnetic spectrum that is visible to the human eye, with wavelengths ranging from approximately 400 nm (violet) to 700 nm (red).
Infrared (IR) radiation: A form of electromagnetic radiation with wavelengths longer than visible light but shorter than microwaves. IR radiation is commonly used in remote temperature sensing.
Microwave radiation: A form of electromagnetic radiation with wavelengths longer than infrared radiation but shorter than radio waves. Microwaves are commonly used in communication and cooking.
Radio waves: A form of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum. Radio waves are commonly used in communication and navigation.
"A typical human eye will respond to wavelengths from about 380 to about 750 nanometers."
"In terms of frequency, this corresponds to a band in the vicinity of 400–790 terahertz."
"These boundaries are not sharply defined and may vary per individual."
"Under optimal conditions these limits of human perception can extend to 310 nm (ultraviolet) and 1100 nm (near infrared)."
"The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well."
"Unsaturated colors such as pink, or purple variations like magenta, for example, are absent because they can only be made from a mix of multiple wavelengths."
"Colors containing only one wavelength are also called pure colors or spectral colors."
"Visible wavelengths pass largely unattenuated through the Earth's atmosphere via the 'optical window' region of the electromagnetic spectrum."
"Clean air scatters blue light more than red light, and so the midday sky appears blue."
"The optical window is also referred to as the 'visible window' because it overlaps the human visible response spectrum."
"The near infrared (NIR) window lies just out of the human vision, as well as the medium wavelength infrared (MWIR) window, and the long-wavelength or far-infrared (LWIR or FIR) window."
"Although other animals may perceive them."
"The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye."
"A typical human eye will respond to wavelengths from about 380 to about 750 nanometers."
"These boundaries are not sharply defined and may vary per individual."
"Under optimal conditions these limits of human perception can extend to 310 nm (ultraviolet) and 1100 nm (near infrared)."
"Some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well."
"Unsaturated colors such as pink, or purple variations like magenta, for example, are absent because they can only be made from a mix of multiple wavelengths."
"Visible wavelengths pass largely unattenuated through the Earth's atmosphere via the 'optical window' region of the electromagnetic spectrum."