- #1

- 1

- 0

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter RAFIQ MULLA
- Start date

- #1

- 1

- 0

- #2

DEvens

Education Advisor

Gold Member

- 1,203

- 457

You need to explain a little more. What is divided by what? Can you give an example?

In converting from cgs into SI, usually there is no division of c or by c. So it is very confusing what you mean.

- #3

sophiecentaur

Science Advisor

Gold Member

2020 Award

- 26,145

- 5,363

Conversions between units can be tricky unless you are scrupulous with all your multiplying factors.

- #4

Meir Achuz

Science Advisor

Homework Helper

Gold Member

- 3,530

- 114

[itex]1/(4\pi\epsilon_0)[/itex] in SI units is equal to c^2, with factors of ten coming in in the conversion from cgs to MKS.T his comes from [itex]\epsilon_0\times \mu_0=1/c^2[/itex]. [itex]\mu_0[/itex] is not a fundamental constant, but just comes from

[itex]\mu_0/4\pi=10^{-7}[/itex] with the factor [itex]10^{-7}[/itex] coming from the different units. There is also a factor of ten due to the difference between the original absolute Ampere and the SI Ampere.

Historically, the c came as the ratio between the electric charge that was natural for the current in magnetic phenomena and the electric charge that occurred in electrostatic phenomena. In order to use only one charge, the factor c was introduced.

[itex]\mu_0/4\pi=10^{-7}[/itex] with the factor [itex]10^{-7}[/itex] coming from the different units. There is also a factor of ten due to the difference between the original absolute Ampere and the SI Ampere.

Historically, the c came as the ratio between the electric charge that was natural for the current in magnetic phenomena and the electric charge that occurred in electrostatic phenomena. In order to use only one charge, the factor c was introduced.

Last edited:

- #5

mfb

Mentor

- 35,505

- 11,955

100 cm/s = 1 m/s because 100 centimeters are one meter.

The same applies to multiples of this speed.

The same applies to multiples of this speed.

Share: