# Measuring waves on a string

I can find the speed of waves on a string by measuring ‘standing wave’ patterns.

# Measuring waves on a string

I can find the speed of waves on a string by measuring ‘standing wave’ patterns.

## Slide deck

## Lesson details

### Key learning points

- To find standing wave frequencies, increase the frequency of the oscillator until a standing wave pattern is seen.
- The wavelength of the waves can be found from the length of the oscillating string and the standing wave pattern
- The speed of waves on a string only depends on the properties of the wave medium (the string).
- For waves on a string, frequency and wavelength are inversely proportional
- Control variables are the quantities that must be kept the same during experiments so they don’t affect results.

### Common misconception

Frequency or wavelength of waves on a string will affect the wave speed.

The speed of waves on a string only depends on the properties of the wave medium (the string) e.g. tension, density

### Keywords

Standing wave - A standing wave is a stable pattern of oscillation that does not appear to travel across a wave medium.

Tension - Tension is the name for the force applied to a stretched string or rope. Without any tension a string or rope would be slack.

Inverse - Division is the mathematical inverse (opposite) of multiplication, so the inverse of ×2 is ÷2 (which can also be written as ×½).

Proportion - A proportion is an exact mathematical comparison, such as double, half (50%), triple, a third, quadruple, a quarter etc.

Control variable - Control variables are the quantities that must be kept the same during experiments so they don’t affect results.

### Content guidance

- Equipment requiring safe usage.

### Supervision

Adult supervision recommended.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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## Worksheet

## Starter quiz

### 6 Questions

what you change in each test to see what effect it has

what you monitor to see if it changes in response

what you keep the same so they don't affect the results