Figure 12 shows part of a wave - Edexcel - GCSE Physics - Question 8 - 2021 - Paper 1

To find the wavelength from Figure 12, we first need to identify the distance between two consecutive peaks (or troughs) of the wave displayed on the graph.

Upon examining the graph:

• The first peak is located at around 0 cm and the next peak occurs at approximately 28 cm along the x-axis.

Therefore, the wavelength ( ( \lambda ) ) can be calculated as:

$\lambda = \text{Distance between peaks} = 28 \text{ cm}$

Thus, the wavelength of the wave is:

Wavelength = 28 cm.