What is meant by the terms (1) amplitude (2) frequency, of a wave ?

Explanation

### Step-by-Step Text Solution:

1. **Definition of Amplitude**:
- Amplitude refers to the maximum displacement of a wave from its mean (equilibrium) position. It is the height of the wave from the center line to the peak (or trough) of the wave.
- In a graphical representation of a wave, the amplitude is measured from the mean position to the crest (the highest point) or to the trough (the lowest point).

2. **Definition of Frequency**:
- Frequency is defined as the number of complete oscillations or cycles that occur in a unit of time, typically measured in seconds.
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