visible spectrum
Học thuậtThân thiện
Definition
Noun: The range of electromagnetic radiation that can be detected by the human eye. It is the portion of the full electromagnetic spectrum that is visible as light, typically from wavelengths of about 380 to 750 nanometers, and is perceived as the colors from violet to red.
Usage
The term "visible spectrum" is used to describe the specific band of wavelengths that constitute visible light. It is a scientific term commonly used in physics, optics, and color theory.
Examples
- White light is composed of all the colors in the visible spectrum.
- A prism separates light into the colors of the visible spectrum.
- The human eye is sensitive only to the visible spectrum; we cannot see infrared or ultraviolet light.
Advanced Usage
- "to be outside/outside of the visible spectrum": Refers to electromagnetic radiation with wavelengths longer (infrared) or shorter (ultraviolet) than what humans can see.
- Many insects can see ultraviolet light, which is outside the human visible spectrum.
Variants and Related Words
- Spectrum (n): The entire range of wavelengths of electromagnetic radiation. The visible spectrum is a small part of this.
- Visible light (n): Often used synonymously with "visible spectrum," though it can refer to the phenomenon itself rather than the range.
- Optical spectrum (n): A less common synonym for the visible spectrum.
Synonyms
- Color spectrum
- Light spectrum
Related Phrases
- Roy G. Biv: A mnemonic acronym for the sequence of hues in the visible spectrum: Red, Orange, Yellow, Green, Blue, Indigo, Violet.
Noun
- the distribution of colors produced when light is dispersed by a prism