Question

state any two ways used to measure distance​

Answer 1

Answer:

To measure distance we can measure Radar - measuring distances in our solar system.

Parallax - measuring distances to nearby stars.

Explanation:

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Answer 2

Answer:

There are three main types of horizontal or linear distance measurement.

Direct Method.

Optical Method.

Elelectronic Method.

Explanation:-

Direct Method:-

The measurement of distance is one of the fundamental operations in engineering surveying and the methods involved are divided into two categories, direct and indirect. The direct method involves the use of tapes and chains which are generally laid along the straight line joining the two points.

Optical Method:-

It involves the use of the two short lines marked on the diaphragm of the majority of theodolite and level telescopes. These lines are called the stadia hairs or stadia lines and are marked as shown in figure 6.1. The distance between the stadia hairs is fixed and is called the stadia interval.

Electronic Method:-

Electronic distance measurement in general is a term used as a method for distance measurement by electronic means. In this method instruments are used to measure distance that rely on propagation, reflection and reception of electromagnetic waves like radio, visible light or infrared waves.

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