Weeks 2, 3, 4 Achieve question 14

[Jolene Robles 2H]

Hello,

I am confused on how to solve questions when they give you the photon of certain color. For example, the achieve question asks “what would the speed of each particle be if it had the same wavelength as a photon of blue light (wavelength = 450.0 nm)? Is the 450 a constant number or where am I able to find all of the wavelength number of the different colored photons? And how do you find the proton, neutron, electron, and particle speed?

[Jasmeen Kaur 2D]

I don't believe the 450 is a constant number as blue light can range between certain wavelengths as such you will typically be given the wavelength of the certain light they expect you to calculate the speed of. The speed be it for a neutron, electron or particle can be calculated by rearranging the de Broglie equation to become v=h/mλ. It's just that they will have different masses (listed in the constants and equations sheet we will be given on the exam).