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When gas welding or burning, welders are required to wear tinted goggles or welding hoods with a filter lens of not less than a _____ shade.

A. Light
B. Dark
C. Clear
D. Yellow

Answer :

Final answer:

In welding, a dark shade is necessary for goggles or hoods to protect the eyes from the intense light produced. This is because humans can detect a wide spectrum of light even in a vacuum, making protection crucial.

Explanation:

When gas welding or burning, welders are required to wear tinted goggles or welding hoods with a filter lens of not less than a dark shade. This is crucial to protect the eyes from the intense light produced by the process and prevent damage to the retina. Understanding the physics of light detection can inform why this is necessary. Humans can see a sizable portion of the light spectrum, with light signals passing even through a vacuum into the eye. Therefore, shielding the eyes with a dark filter helps ensure the welding light does not overpower the eye's capacity to detect light safely.

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