Question

if the distance from point A to B in the diagram is 270 cm. What is the wavelength of this wave?

Answer 1

Answer:

Explanation:

2/3 * 270

= 2*90

=180 cm

Answer 2

Correct Question is attached.

Solution:

First of all, how is wavelength defined?

• Wavelength is defined as the distance between two adjacent crests or troughs.

In the diagram, the distance between A and B contains one full wavelength upto Point C and then half wavelength upto Point B.

Let wavelength be $\lambda$.

$\therefore \: \lambda + \dfrac{ \lambda}{2} = 270$

$\implies\: \dfrac{ 2 \lambda + \lambda}{2} = 270$

$\implies\: \dfrac{ 3 \lambda}{2} = 270$

$\implies\: \lambda = 270 \times \dfrac{2}{3}$

$\implies\: \lambda = 180 \: cm$

So, wavelength is 180 cm.