Electromagnetic Spectrum:
* Radio waves: Longest wavelengths, ranging from millimeters to kilometers.
* Microwaves: Shorter than radio waves, ranging from millimeters to centimeters.
* Infrared radiation (IR): Wavelengths from micrometers to millimeters.
* Visible light: The range we can see, with red having the longest wavelength (around 700 nanometers) and violet the shortest (around 400 nanometers).
* Ultraviolet (UV) radiation: Shorter than visible light, ranging from 10 to 400 nanometers.
* X-rays: Even shorter wavelengths, ranging from 0.01 to 10 nanometers.
* Gamma rays: The shortest wavelengths, ranging from less than 0.01 nanometers.
Nanometers (nm) are a common unit for measuring light wavelengths:
* 1 nanometer = 1 billionth of a meter (10^-9 meters)
Examples of light wavelengths:
* Red light: 650-700 nm
* Green light: 500-570 nm
* Blue light: 450-495 nm
* X-ray used in medical imaging: 0.1 nm
* Gamma rays emitted from radioactive decay: 0.01 nm
Note: This is a simplified explanation. The precise wavelengths of light can vary within each category and depend on the specific source of the light.
