Which statement correctly describes the difference between singlemode and multimode fiber?

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Multiple Choice

Which statement correctly describes the difference between singlemode and multimode fiber?

Explanation:
The difference being tested is how many light paths the fiber can carry, which comes down to core diameter. A singlemode fiber uses a very small core, about 8–10 micrometers, so light travels mainly along a single path. That keeps modal dispersion low and supports higher bandwidth over long distances. Multimode fiber has a much larger core, around 50 micrometers, allowing many light paths to propagate simultaneously. Those multiple paths reach the end at different times, causing modal dispersion and limiting distance and bandwidth. So, singlemode fiber has a smaller core than multimode fiber.

The difference being tested is how many light paths the fiber can carry, which comes down to core diameter. A singlemode fiber uses a very small core, about 8–10 micrometers, so light travels mainly along a single path. That keeps modal dispersion low and supports higher bandwidth over long distances. Multimode fiber has a much larger core, around 50 micrometers, allowing many light paths to propagate simultaneously. Those multiple paths reach the end at different times, causing modal dispersion and limiting distance and bandwidth. So, singlemode fiber has a smaller core than multimode fiber.

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