# Stationary wave ?

The answer is B but how to solve it?

Could anyone give my some tips to solve this type of question?....

Thank you

### 1 Answer

Relevance

- rotchmLv 73 months agoFavorite Answer
The distance between two nodes is a half wavelength (a "bump").

Your x is 3 bumps, or, 1.5 wavelengths = 1.5λ.

But c = λf --> λ = c/f.

Thus x = 1.5λ = 1.5 * c/f.

You are given c & f. Compute. Done!

Don't forget to vote BA.

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