Which line is written in iambic pentameter?

Iambic pentameter has five pairs of syllables, with the stress falling on the second syllable in each pair. In “Look through the lens and gaze upon the stars,” the beats fall on “through,” “lens,” “gaze,” “upon,” and “stars,” creating five iambs: look THROUGH / the LENS / and GAZE / upON / the STARS. So the line is written in iambic pentameter.

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