How to know which equation to use

[904914037]

When trying to find the velocity of an object, how do you know whether to use the equation v=c/(wavelength) or v=h/(mass x wavelength)?

[Diana_Diep2I]

We can only use v=c/wavelength if you're trying to find the frequency of light

[Diana_Diep2I]

And isn't it also whatever value is given? Is there an example problem that you have?

[Brittany Tran 3I]

the equation v=c/wavelength is used to find frequency, not velocity. you can use v=h/(mass*wavelength) to find velocity, depending on the specific question

[Minh Ngo 4G]

I think you get confused "v" of velocity and "v" of frequency. But i guess it depends on the info given to you???

[904914037]

Yes, I forgot that "V" and "v" represent different variables! Thank you for the clarification, it makes sense now!

[BeylemZ-1B]

When trying to find the velocity of an object, how do you know whether to use the equation v=c/(wavelength) or v=h/(mass x wavelength)?

the "v" is not in reference to velocity as it would be in Physics. the "v" is the frequency of the light!! definitely a distinction that needs to be made.

[505106414]

What is a real-world application of this equation?

[Jocelyn Thorp 1A]

What is a real-world application of this equation?

the v for frequency is actually nu (fun fact), and this is used to calculate wavelength, where c=lambda*v.

[Brynne Burrows 3K]

Both of those equations are referring to v as frequency instead of velocity, but you can use velocity in the equation E=1/2Me*Ve.