Singlemode fibers have a _ core than multimode fiber.

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Multiple Choice

Singlemode fibers have a _ core than multimode fiber.

Explanation:
Single-mode fibers have a smaller core diameter than multimode fibers. The small core—about 8–10 micrometers—confines light so it travels in a single path (one mode), which minimizes modal dispersion and supports longer, higher-speed transmissions. Multimode fibers use a larger core—around 50 micrometers or 62.5 micrometers—allowing many modes to propagate, which increases modal dispersion but makes coupling easier from sources with larger mode fields. So the correct statement is that the core is smaller. The other options would imply a larger core, the same size, or depend on fiber type, which doesn’t match how SMF and MMF are defined.

Single-mode fibers have a smaller core diameter than multimode fibers. The small core—about 8–10 micrometers—confines light so it travels in a single path (one mode), which minimizes modal dispersion and supports longer, higher-speed transmissions. Multimode fibers use a larger core—around 50 micrometers or 62.5 micrometers—allowing many modes to propagate, which increases modal dispersion but makes coupling easier from sources with larger mode fields. So the correct statement is that the core is smaller. The other options would imply a larger core, the same size, or depend on fiber type, which doesn’t match how SMF and MMF are defined.

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