A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength
which does not change.

Explanation

To answer the question about which property of a wave remains constant when it passes from one medium to another, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Wave Properties**:
- A wave has three main properties: speed, frequency, and wavelength.

2. **Identifying the Medium Transition**:
...