Recent content by thatoneguy123

i found be by taking hc/ lamda squared and dividing it by the momentum squared

Find the kinetic energy of the following particles that each have a de Broglie wavelength of 0.50 nm.? (a) photons ____eV = 2480eV (b) electrons ____eV (c) neutrons ____eV (d) α particles ____eV i know E= hc/wavelength which = a and after that I am stuck i know that the wavelength =...

no that's why i don't get how to do this.

A photon having 20 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain? Homework Equations \lambda' - \lambda = (h/mc)(1-cos(theta)The Attempt at a Solution i just don't know where to get started or anythign can someone show me how to do this?

Can someone help me through this step by step? i keep trying, but i can't seem to get the correct answers. It's just a book problem i don't understand why it is soo difficult, but i don't know how to do this someone please help me!