Combining SR and the Broglie Wavelength equations: Are they cumulative?

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I don't think this would ever come up on any of my tests in high school, but how would one answer a question combining the Broglie Wavelength of a particle and Special relativity?
Are they cumulative?

BW : λ= h/mv
 
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What do you mean by "combine"?
 


like when the wavelength shortens when the particle goes faster, would, from a stationary reference point relative to the particle's motion, because of the motion, the wavelength appear to be even shorter?
 


Sounds like you're wanting to count the same effect twice, fast guy. The relationships are E = ħω, p = ħk, and these hold even for relativistic particles and in all reference frames. If the particle is relativistic, use p = γmv, that's all.
 

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