Actual water vapour content of atmosphere is

Options

A. Relative humidity
B. Differential humidity
C. Absolute humidity
D. Positice humidity

Answer

To determine the actual water vapor content of the atmosphere, we need to understand the different types of humidity and how they relate to water vapor content. Here’s a step-by-step solution:

### Step 1: Understanding Humidity
- **Definition of Humidity**: Humidity refers to the amount of water vapor present in the air. There are different ways to measure and express humidity.

### Step 2: Types of Humidity
- **Relative Humidity**: This is the amount of moisture in the air compared to the maximum amount of moisture the air can hold at a given temperature. It is expressed as a percentage.

- **Absolute Humidity**: This measures the actual amount of water vapor in the air, regardless of temperature. It is expressed in grams of water vapor per cubic meter of air.

- **Differential Humidity**: This term is less commonly used, but it generally refers to conditions of high humidity that can lead to discomfort.

- **Positive Humidity**: This term refers to a comfortable level of humidity that is conducive to living conditions.

### Step 3: Identifying Actual Water Vapor Content
- The question asks for the actual water vapor content of the atmosphere. The most appropriate term for this is **Absolute Humidity**, as it quantifies the actual amount of water vapor present without considering temperature.

### Step 4: Conclusion
- Based on the definitions and explanations provided, the correct answer to the question "Actual water vapor content of atmosphere is" is **Absolute Humidity**.

### Final Answer:
- The actual water vapor content of the atmosphere is **Absolute Humidity**.

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