What is the number of wave peaks that pass by a given point per unit time?

Work done per unit time

What is the number of circles passing through a given pair of points ?

What name is given to trust per unit area ?

With reference to sound, the number of to and fro motions of a membrane in per unit time is expressed in the unit of

Assertion : Wave number is the number of waves per units length. Reason : Wave number =(1)/(lambda) .

The dimensional formula of energy propagated per unit area at a given point in unit time is.....

Number of waves passing through a point in one second

Assertion : Wave number is the number pf waves per units length. Reason : Wave number =(1)/(lambda) .

What is the SI unit of Wave number (n)?