Question

the distance between the two successive crests in a screw thread is called as:

Answer 1

In wave it is called wavelength

Answer 2

Explanation :

Any disturbance created in a medium is defined as a wave. There are many types of waves.

There are some parameters that can be defined in a wave i.e. frequency, wavelength, amplitude etc.

The uppermost peak of a wave is called crest and the lowermost peak of a wave is called is trough.

The distance between two consecutive crests or trough is called the wavelength of a wave.

The relation between the frequency and the wavelength is given by :

$v=\nu\times \lambda$

Where,

$v$ is the velocity

$\nu$ is the frequency of the wave

$\lambda$ is the wavelength.

Hence, this is the required solution.