Key Stage 3 (KS3) Physics Practice Test

Question: 1 / 400

What is a result of increasing the frequency of a wave?

The amplitude increases

The wavelength decreases, assuming the wave speed remains constant

Increasing the frequency of a wave leads to a decrease in the wavelength if the wave speed remains constant. This relationship can be understood through the wave equation, which states that wave speed is equal to frequency multiplied by wavelength (v = f × λ).

When the frequency (f) increases while keeping the speed of the wave (v) constant, the wavelength (λ) must decrease to maintain the equation's balance. This means that higher frequency waves have shorter wavelengths.

This is particularly evident in various types of waves, such as sound waves or electromagnetic waves, where the characteristics of the wave are inherently linked through this equation. Therefore, when grappling with how waves behave as frequency changes, it's essential to recognize this inverse relationship between frequency and wavelength at constant speed.

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The wave speed increases

The wave reflects more frequently

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