Meter is SI unit used for defining the distance covered by an object. 1 meter means than the object has covered 1 meter distance in a given time period.

Definition of 1 meter in physical terms:

The meter is the fundamental unit of length in the International System of Units (SI). It is defined as the distance traveled by light in a vacuum during a time interval of 1/299,792,458 of a second. This definition was established by the General Conference on Weights and Measures (CGPM) in 1983 and is based on the speed of light, which is an absolute constant in physics.

Explanation:

1. Background:
The need for a standardized unit of length was recognized throughout history, and various systems were developed by different civilizations. However, the introduction of the metric system in the late 18th century aimed to provide a coherent and decimal-based system of measurement. The meter was one of the key units established in this system.

2. Definition:
The current definition of the meter is based on the concept of the speed of light. The speed of light in a vacuum is approximately 299,792,458 meters per second. By defining the meter as the distance traveled by light in 1/299,792,458 of a second, a precise and universal standard for measuring length was established.

3. Implementation:
To measure the length of an object using the meter, various methods and instruments can be employed. These include:

- Rulers and tape measures: These tools have markings in centimeters and millimeters, allowing for precise measurements of smaller lengths.
- Laser interferometry: This technique utilizes the interference patterns of laser light to measure distances with high accuracy.
- Time of Flight (TOF) measurements: By measuring the time taken for a pulse of light to travel a known distance, the length can be calculated.

4. Importance:
The meter is a fundamental unit of length and is widely used in scientific research, engineering, construction, and everyday life. It provides a consistent and standardized way to measure distances, ensuring accuracy and compatibility across different fields and regions of the world.

5. Derived Units:
The meter serves as the base unit for other derived units of length in the metric system, such as the kilometer (1,000 meters), centimeter (1/100 of a meter), and millimeter (1/1,000 of a meter).

Conclusion:
The meter is a fundamental unit of length defined as the distance traveled by light in a vacuum during a specific time interval. Its precise definition based on the speed of light allows for accurate and standardized measurements in various fields.