Question

John attaches a large spring to a small spring for a job that he has to complete. He notices that as the wave travels from spring 1 to spring 2, its wavelength is decreased by 50%. Which statement describes the change in the speed of the wave?

(1 point)
Responses

The speed decreases by 50% because speed and wavelength are inversely proportional.
The speed decreases by 50% because speed and wavelength are inversely proportional.

The speed decreases by 50% because speed and wavelength are directly proportional.
The speed decreases by 50% because speed and wavelength are directly proportional.

The speed increases by 50% because speed and wavelength are directly proportional.
The speed increases by 50% because speed and wavelength are directly proportional.

The speed increases by 50% because speed and wavelength are inversely proportional.
The speed increases by 50% because speed and wavelength are inversely proportional.

Answer 1

The speed decreases by 50% because speed and wavelength are directly proportional.

Reason: frequency is the same crossing the boundary, so v = fλ. If λ is halved, v is halved.