What is the advantage of defining metre in terms of velocity of light?
Answers
Answer:
The biggest advantage of the same is that the wavelength of light does not changes with time, pressure, temperature, etc. Moreover, it can be easily reproducible due to the presence of krypton everywhere.
Answer:
Hope it helps
Explanation:
Dear Student,
Because it’s the most accurate way devised, so far, to define a metre. There are a few advantages of defining meter like this. Firstly speed of light is constant and unchanging. Let's take a look at definition of meter-
The meter is the basic unit of length in the SI system of units. The meter is defined to be the distance light travels through a vacuum in exactly 1/299792458 seconds.
Remember in practice, it is easy to measure time more correctly than length making it more accurate. Alternative ways of measuring a metre have been used, but are not as accurate as this one.