In regards to our know spectrum,which wavelength can travel the furthest,through any given medium???

Answer 1

High energy phtons travel the farthest. We are used to visible light reflecting off surfaces. This means the light does not penetrate. A few items like glass and water are penetrated by light. Visible light has a wavelength around 500 nm (nm is nanometers or 10^-9 m). When you go to higher energy (shorter wavelengths) like x-rays, all matter is penetrated to some extent. Thats what makes medical x-rays (around 0.01 nm wavelength) work. The more dense bone tissue attenuates (absorbs) the x-rays more leaving less exposed (white) regions on the film. For more dense materials like steel, engineers need to use even higher energy (shorter wavelength) to get enough penetration (around 0.0005 nm). Simply, the higher the energy (shorter wavelength) the more penetration and there really is no limit. Although photons past 0.00005 nm are unusual.

Answer 2

X-rays?

Answer 3

gamma rays

Answer 4

alpha?