help needed ASAP! (1 Viewer)

[melllyy]

i have this question,
it says to calculate the wavelength of an electron travelling at 5.00x10^5 m/s. I dont know if its really simple or not but i cant find any equation to work it out. Please help

 

[Riviet]

I think you need to use E=hf, rearrange it to get f=E/h. Find E (use information in the question), then find f, finally you can use the wave equation v=fλ to find wavelength. Hope that helps.

 

[brownsound]

electrons hav wavelengths? man i gotta start paying attention in physics more.
too bad test it tomoro

 

[rama_v]

i have this question,
it says to calculate the wavelength of an electron travelling at 5.00x10^5 m/s. I dont know if its really simple or not but i cant find any equation to work it out. Please help

This is no longer in the ideas to implementation section, but it is in quanta to quarks. The formula you need is de broglie's formula, lambda = h / mv

 

[Riviet]

Ah, that explains the lack of information, thanks Rama.