Which device is used for measuring temperature?

Options

A. Thermometer
B. Light meter
C. Ammeter
D. Clock

Answer

To solve the question "Which device is used for measuring temperature?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Question**: We need to determine which device is specifically used for measuring temperature.

2. **List the Options**: The options provided are:
- Thermometer
- Light meter
- Arm meter
- Clock

3. **Analyze Each Option**:
- **Clock**: This device is used to measure time, not temperature.
- **Arm Meter**: This device measures electric current, not temperature.
- **Light Meter**: This device measures the intensity of light, not temperature.
- **Thermometer**: This device is specifically designed to measure temperature.

4. **Select the Correct Option**: Based on the analysis, the correct answer is the thermometer, as it is the only device among the options that measures temperature.

5. **Conclusion**: Therefore, the device used for measuring temperature is the **thermometer**.