Danger signals are always painted in red. Choose the incorrect statement.

Options

A. Red light can be seen from the farthest distance
B. The wavelength of red light is maximum
C. Scattering of red light is least
D. Red is the colour of courage and fear

Answer

To solve the question "Danger signals are always painted in red. Choose the incorrect statement," we will analyze the statements related to the properties of red light and its significance.

### Step-by-Step Solution:

1. **Understanding the Importance of Red Color**:
- Red is used for danger signals because it can be seen from a distance and is less likely to be confused with other colors.

2. **Analyzing Statements**:
- **Statement 1**: "Red light can be seen from the farthest distance."
- This statement is correct. Red light has a longer wavelength, which allows it to travel further without scattering as much as other colors.

- **Statement 2**: "The wavelength of red light is the longest among visible colors."
- This statement is also correct. Red light has the longest wavelength in the visible spectrum.

- **Statement 3**: "The scattering of red light is the least."
- This statement is correct. Red light scatters less compared to colors like violet or blue, which scatter more due to their shorter wavelengths.

- **Statement 4**: "Red is the color of courage and fear."
- This statement is incorrect. While red can symbolize various emotions, it is not universally recognized as a color of courage and fear. It is more commonly associated with danger and warning.

3. **Conclusion**:
- The incorrect statement among the options is Statement 4. Therefore, the answer to the question is that the incorrect statement is option number 4.

### Final Answer:
The incorrect statement is: **"Red is the color of courage and fear." (Option 4)**