Choose the wrong statement:

Options

A. Speed of sound is much less than speed of light
B. Sound travels about 330 metres in one second
C. Light travels faster in vacuum than in air
D. Wavelength of light is longer than the wavelength of sound

Explanation

To solve the question of identifying the wrong statement among the given options, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement 1: Speed of sound is much less than speed of light.**
- The speed of sound is approximately 340 m/s, while the speed of light is approximately \(3 \times 10^8\) m/s.
- Since 340 m/s is indeed much less than \(3 \times 10^8\) m/s, this statement is **correct**.

2. **Statement 2: Sound travels about 330 meters in one second.**
- The speed of sound is around 330 m/s, which means it travels approximately 330 meters in one second.
- Therefore, this statement is also **correct**.

3. **Statement 3: Light travels faster in vacuum than in air.**
- The speed of light in a vacuum is the maximum speed at which light can travel, and it is faster than in any medium, including air.
- Thus, this statement is **correct**.

4. **Statement 4: Wavelength of light is longer than the wavelength of sound.**
- The wavelength of light is in the range of 400 nm to 700 nm (which is \(400 \times 10^{-9}\) m to \(700 \times 10^{-9}\) m).
- For sound, using the formula \( \lambda = \frac{v}{f} \), where \(v\) is the speed of sound (approximately 330 m/s) and \(f\) is the frequency (20 Hz to 20 kHz), we can calculate the wavelength of sound.
- For example, at 20 Hz, the wavelength would be \( \lambda = \frac{330 \text{ m/s}}{20 \text{ Hz}} = 16.5 \text{ m}\).
- This shows that the wavelength of sound can be much longer than that of light.
- Therefore, this statement is **incorrect**.

### Conclusion:
The wrong statement is: **Wavelength of light is longer than the wavelength of sound.**

---