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Yeah, you can mention either method - Perhaps the ionisation method is better for medical physics; where the inner shell electron is knocked out, and thus is replaced by an outershell electron - the energy difference between the two electrons determines the frequency of the electromagnetic...

That is correct by my understanding, however in order to gain full marks you would also have to mention the underlying physics behind how X-radiation is produced e.g. talk about the Bremsstrahlung ionisation that occurs - and how the amount of 'braking' of the electron will determine the...

1 Rayl = 10^6 kg m^-2 s^-1 is this right?

In this type of q - is it ok to "make up" some figures to support your argument?

thanks man

Jacaranda - page 206: q11 A red laser emitting 600nm (wavelength = 6.0 x 10^-7 m) wavelength light and a blue laser emitting 450nm light emit the same power. Compare their rate of emitting photons. the worked solution is here...

i know the induction well, not the others... I think its wise to know the others as well though, you never know, the dot point is very broad

thanks for the help :)

The hint was "real explanation... photoelectric effect" It's pretty confusing though

"Discuss the advantages of using superconductors and identify limitations to their use" What are some limitations of superconductors?