Question

If the wave is moving to the right after 4 seconds the leaf will be at the position:

Options

• 1

• 2

• 3

• 4

Answer 1

3

Explanation:

The time period of the wave is \(2\,\text{s}\). Therefore, in \(4\,\text{s}\), the wave completes two cycles and advances by two wavelengths. Hence, the corresponding crest moves from position 1 to position 3.