Answer
The period is halved.
Work Step by Step
The period, T, is the reciprocal of the frequency, f. $T = \frac{1}{f}$.
When the frequency f doubles, the period T will be cut in half.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.