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Lasers can also have superior temporal coherence, which permits them to emit gentle with an extremely slender frequency spectrum. Temporal coherence can also be used to make ultrashort pulses of sunshine which has a wide spectrum but durations as small being an attosecond.[seven]สามารถย่à¸à¸‚นาดได้เนื่à¸à¸‡à¸ˆà