2005年4月14日 · This gives us the conversion factor of 1 cm^-1 = 1/wavelength eV. Plugging in the value for wavelength (in meters), we get 1 cm^-1 = 1/(wavelength in cm * 0.01) eV. Simplifying this, we get 1 cm^-1 = 0.00012398 eV. Therefore, to convert from cm^-1 to eV, we simply need to multiply the value in cm^-1 by 0.00012398.

2014年4月20日 · In a velocity selector apparatus, i had an electric potential set across two points, and a proton at rest at one end. The potential was 350 V. My instructor used : qV = 1/2 mv^2 to find the velocity at the end of the apparatus. Where did the left hand side of the eqn come from??

2011年8月27日 · B Is time travel... travelling from one 3 dimensional space time to another 3 dimensional space time?

2021年7月7日 · An infinitely deep square well has width L = 2.5 nm. The potential energy is V = 0 eV inside the well (i.e., for 0 ≤ x ≤ L). Seven electrons are trapped in the well. 1)What is the ground state (lowest) energy of this seven electron system? 2)What is the energy of the first excited state of the system?

2025年3月6日 · I know from a table in my textbook that the cross-section for the ionized cloud is ##6.3*10^{-18} cm^2##, but I don't know L, the distance a particle travels, or n, the number of particles in the cloud. Maybe I can assume L is very far given the vantage point is on the surface of Earth, but then I don't know what n would be.

2011年4月28日 · V is used for electromotive force, eV is energy and actually means the energy gained by an electron moving through a 1 V potential difference. So you can't really convert between the two. Perhaps it would be more useful to picture V …

2011年1月9日 · It can be shown that the allowed energies of a particle of mass m in a two dimensional square box of side L are E =h 2 (n 2 +m 2)/8mL 2 The energy depends on two quantum numbers, n and m, both of which must have an integer value 1, 2, 3... What is the minumum energy for a particle in a two dimensional quare box of side L?

2009年12月5日 · Okay, I just need to grasp what the equation C = Vλ means . Correct me if I am wrong. c = speed of light v = speed of frequency λ = wavelength So if I wanted to find the speed of the frequency of a photon with a wavelength of 450nm So I …

2005年10月20日 · In an intrinsic semiconductor, Ef is the fermi energy and sits right in the middle of the band gap. Ec and Ev are the energy of the bottom of the conduction band and the energy of the top of the valence band, respectively. This means that Ec - Ev = Egap. It also means that since Ef is right in the middle of the gap, Ec - Ef = Egap/2

2013年3月12日 · My mechanics syllabus suggests that we can model acceleration as ##v(dv/dx)## but what exactly does this mean? Can you give me (or link me to) some explanations and/or sample problems with worked solutions? In my experience so far we should always be using ##dv/dt## for ##a##.