Question

In arc welding, eyes need to be protected against -

Answer 1

1. An electrical arc is an electrical current that discharges itself purposefully or accidentally across a gap between two electrodes using a gas, vapor, or air while putting out comparatively less voltage across the conductors.
2. Welding arcs emit radiation at a variety of wavelengths, ranging from 200 nanometers to 1,400 nanometers (or 0.2 to 1.4 $\mathrm{\mu }$m, micrometers).
3. This encompasses visible light (400–700 nm), infrared (700–1,400 nm), and ultraviolet (UV) radiation (200–400 nm).
4. This is why eye protection from both UV and infrared radiation is necessary.

As a result, while arc welding, it's important to shield the eyes from flying metal pieces and dangerous radiation, such as UV or IR radiation.