Beckmann's thermometer measures :

Options

A. High temperature
B. Low temperature
C. Normal temperature
D. All temperature

Answer

To solve the question regarding what Beckmann's thermometer measures, we can follow these steps:

### Step 1: Understand the Function of Beckmann's Thermometer
Beckmann's thermometer is a specialized type of thermometer. It is important to recognize that it is designed to measure temperature changes rather than absolute temperatures.

**Hint:** Research the specific applications of Beckmann's thermometer to understand its purpose.

### Step 2: Identify the Temperature Range
Beckmann's thermometer is particularly sensitive and is used to measure small differences in temperature, which typically falls within the low temperature range.

**Hint:** Consider the context in which Beckmann's thermometer is used, such as in laboratories or specific scientific experiments.

### Step 3: Eliminate Incorrect Options
Given the options: high temperature, low temperature, normal temperature, or old temperature, we can eliminate high temperature and old temperature as they do not align with the known function of Beckmann's thermometer.

**Hint:** Think about the definitions of high and low temperatures in scientific contexts to help narrow down the options.

### Step 4: Confirm the Correct Answer
Since Beckmann's thermometer is known for measuring low temperatures and small temperature differences, we can conclude that the correct answer is low temperature.

**Hint:** Review the characteristics of thermometers to differentiate between types and their specific uses.

### Final Answer
Beckmann's thermometer measures low temperature.