What is the 650nm wavelength?

650nm Wavelength

The 650nm wavelength falls within the visible spectrum of light, which ranges from approximately 380nm to 750nm where visible light is situated between ultraviolet and infrared light in the electromagnetic spectrum. More specifically, a 650nm wavelength corresponds to the color red, which is why lasers and LEDs that emit at this wavelength appear red to the human eye.

Properties of 650nm Wavelength

• Color: Visible red light.
• Frequency: Approximately 461 THz (terahertz).
• Photon Energy: About 1.91 eV (electron volts).

Applications of 650nm Wavelength

• Optical media reading devices, such as DVD players and laser pointers.
• Barcode scanners.
• Spectroscopy.
• Medical treatments and therapies, including low-level laser therapy.
• Fiber optic communications where longer wavelengths like 1300nm and 1550nm are more common, but 650nm may be used for short-distance communications.

Note: While 650nm lasers are generally considered safe with appropriate safety measures, they can still pose a hazard to the eyes if used improperly. It is always recommended to handle lasers with caution and use proper eye protection when necessary.