Final answer:
The audience's awareness and Romeo's awareness create dramatic irony which impacts the interpretation of Juliet's description.
Step-by-step explanation:
The discrepancy between the audience's awareness and Romeo's awareness impacts how the description of Juliet in this line is interpreted. While Romeo believes he is describing beauty that transcends death, the audience knows he is describing Juliet merely sleeping. This creates dramatic irony, where the audience is aware of the situation that Romeo is unaware of. It adds depth to the scene and allows the audience to feel sympathy for Romeo's grief and pain.
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