Why must you never look directly into a fiber optic cable?

Get ready for the FCC General Radiotelephone Operator License (GROL) exam. Study with flashcards and multiple choice questions, each with hints and detailed explanations. Prepare effectively for your licensing test!

Multiple Choice

Why must you never look directly into a fiber optic cable?

Eye safety with fiber optics hinges on infrared light that you can't see. Many fiber systems emit light in the infrared range, often from a laser or LED inside the cable. Because infrared is invisible, you won’t realize you’re exposed, and the light can be intense enough to burn the retina. Even brief exposure can cause permanent damage, which is why you must never look directly into a live fiber end and should use proper viewing tools or protective eyewear. The other ideas aren’t the main hazard: the danger isn’t about the end being fragile, nor is it reliable to rely on seeing a red glow, since infrared light is commonly used and invisible to the eye.

Eye safety with fiber optics hinges on infrared light that you can't see. Many fiber systems emit light in the infrared range, often from a laser or LED inside the cable. Because infrared is invisible, you won’t realize you’re exposed, and the light can be intense enough to burn the retina. Even brief exposure can cause permanent damage, which is why you must never look directly into a live fiber end and should use proper viewing tools or protective eyewear. The other ideas aren’t the main hazard: the danger isn’t about the end being fragile, nor is it reliable to rely on seeing a red glow, since infrared light is commonly used and invisible to the eye.

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