Earlier quoted context omitted.
Yes and no. The photographer needs a nice photo, she needs the article to sell books and not get traped again in the ivory tower. Eveyone is happy. It's part of the job. Like politician using a suit and smiling. (Aparently smiling people with suits don't steal or start random wars.) I looked at the equations, they look correct but so unrelated that made me chuckle. I imagine she was chuckling while writing them. I'm…
Anyone recognize all the equations? I only recognize a few specifically and can sort of guess the general area of some of the rest. From left to right then top to bottom: 1. No idea. Based on the E sub λ, the use of Planck's and Boltzmann's constants, and the e^(hc/λkt)-1 I'd guess its the energy of something at wavelength λ and temperature t. I don't recall ever seeing energy have a factor of 1/λ^5 before college wa…
The whiteboard contains several famous physics equations. Here are the ones I can identify:
1. *Einstein's field equations (General Relativity):* \[ E = \frac{8\pi G}{3} \left( \rho + \frac{\Lambda}{8\pi G} \right) \] \[ R_{\mu\nu} - \frac{1}{2} R g_{\mu\nu} + \Lambda g_{\mu\nu} = \frac{8 \pi G}{c^4} T_{\mu\nu} \]
2. *Planck's law:* \[ E = h\nu \] \[ E = \frac{hc}{\lambda} \]
3. *Schrödinger equation (Quantum Mechanics):* \[ i\hbar \frac{\partial \psi}{\partial t} = \hat{H} \psi \]
4. *Lagrangian mechanics:* \[ L = T - V \] where \( T \) is kinetic energy and \( V \) is potential energy.
5. *Newton's law of universal gravitation:* \[ F = G\frac{m_1 m_2}{r^2} \]
6. *Friedmann equations (Cosmology):* \[ \left(\frac{\dot{a}}{a}\right)^2 = \frac{8\pi G}{3} \rho - \frac{k}{a^2} \]
7. *Coulomb's law:* \[ F = k_e \frac{q_1 q_2}{r^2} \]
8. *Boltzmann's entropy formula:* \[ S = k_B \ln \Omega \]
9. *Maxwell's equations (Electromagnetism):* \[ \nabla \cdot \mathbf{E} = \frac{\rho}{\epsilon_0} \] \[ \nabla \times \mathbf{B} - \mu_0 \epsilon_0 \frac{\partial \mathbf{E}}{\partial t} = \mu_0 \mathbf{J} \]
10. *The cosmological equation:* \[ \ddot{a} = -\frac{4 \pi G}{3} (\rho + 3p) a + \frac{\Lambda}{3} a \]
11. *Thermodynamic identity:* \[ dU = TdS - PdV \]
This collection of equations spans various domains of physics, including quantum mechanics, general relativity, electromagnetism, thermodynamics, and cosmology.