Which of the following statements about ycarrier(x, t) is correct?
a. It is a rapidly oscillating wave traveling in the +i^ direction.
b. It is a rapidly oscillating wave traveling in the −i^ direction.
c. It is slowly oscillating in time but is standing still.
d. It is traveling rapidly but oscillating slowly.

Option D : is traveling rapidly but oscillating slowly.

Explanation:

ycarrier(x,t) is traveling rapidly but oscillating slowly.

mistakes are ok

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