Lux is the unit of

Options

A. Intensity of illumination
B. luminous efficiency
C. luminuous flux
D. luminous intensity

Answer

To determine what Lux is the unit of, we can break down the information provided in the transcript step by step.

### Step-by-Step Solution:

1. **Understanding the Definition of Lux**:
- Lux is defined as the unit of illumination. It measures how much light is received on a surface area.

**Hint**: Remember that Lux relates to light and surfaces.

2. **Relation to Other Units**:
- The transcript mentions that illumination intensity is related to Candela, while illumination flux is related to Lumen. Lux is distinct from these units.

**Hint**: Differentiate between illumination intensity (Candela) and illumination flux (Lumen).

3. **Illumination Explained**:
- Lux is specifically defined as the amount of illumination provided when one Lumen is evenly distributed over one square meter area. This means that if you have 1 Lumen of light spread out over 1 square meter, the illumination level is 1 Lux.

**Hint**: Think of Lux as a measure of how concentrated light is over a given area.

4. **Conclusion**:
- Therefore, Lux is indeed the unit of illumination. It quantifies how much light is present in a given area.

**Hint**: Focus on the relationship between light (Lumen) and area (square meters) to understand Lux.

### Final Answer:
Lux is the unit of illumination.