What is the typical wavelength at which police lasers operate?

Police lasers typically operate around 904 nanometers (nm) ± 10 nm. This wavelength falls within the infrared spectrum, which is invisible to the naked eye but can be effectively used for distance measurement. The accuracy in wavelength is important because it ensures that the laser can properly penetrate atmospheric conditions and maintain a clear, detectable signal for measuring speed.

The choice of 904 nm is particularly significant in law enforcement applications because it optimally balances effective distance measurement while minimizing interference from visible light and other environmental factors. This wavelength allows the laser to achieve high precision and reliability, which is essential for accurate speed enforcement.

While other options may suggest wavelengths close to this range, they do not align as closely with the established operational standards for police speed measurement devices. This understanding of wavelength characteristics is critical for law enforcement officers when utilizing speed detection technology effectively.