When We Say That a Cluster of Galaxies Is Acting

question 115

Multiple Choice

When we say that a cluster of galaxies is acting as a gravitational lens, what do we mean?

• A)It bends or distorts the light coming from galaxies located behind it.
• B)The overall shape of the cluster is that of a lens.
• C)It magnifies the effects of gravity that we see in the cluster.
• D)It is an unusually large cluster that has a lot of gravity.

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