The speed would be in a decimal? Or do you want it in a fraction?
Wavelength = (speed) / (frequency) = (460 m/s) / (230/sec) = <em>2 meters</em>
The first one. The E and B chatacteristic are perpendicular to eachother. The direction of the wave can be found by the right hand rule.
The process that produces the energy radiated by stars is nuclear fusion in the core.
For a star on the main sequence, it's the fusion of hydrogen nuclei into helium.
