The velocity of an EM wave in vacuo is the same as the velocity of light in a vacuum: 3 x 108ms-1
Note: the 'e' notation is an alternative version of standard form. (e.g. 1e+6 = 1x106)
Colour Table
Colour | Wavelength in metres | Wavelength in nanometres |
---|---|---|
Violet | 4.249 x 10-7 m | 424.9 nm |
Indigo | 4.498 x 10-7 m | 449.8 nm |
Blue | 4.747 x 10-7 m | 474.7 nm |
Green | 5.254 x 10-7 m | 525.4 nm |
Yellow | 5.747 x 10-7 m | 574.7 nm |
Orange | 6.250 x 10-7 m | 625.0 nm |
Red | 6.993 x 10-7 m | 699.3 nm |