I often notice small patches of snow that remain on the ground in seemingly random locations, many days or even weeks after all other snow in an area has melted, and even when temperatures have been well above freezing for some time. What makes these particular patches of snow so resistant to mel...

Of course you can convert it into metres if you wished, but photon energy is measured as such: $\Delta E=\frac{hc}{\lambda}$ In this scenario, Energy is measured in electron volts. But if we measured light in metres, wouldn't we get joules since we are using SI units? However, when converting bet...

Unlike other forces, the "amount of force" gravity applies to different bodies is different. for example, if your hand has the force of 10 N, it could have accelerated a body with the mass of 1 kg to $10 \ m/s^2$, and a body with a mass of $2$ kg to $5 \ m/s^2$. Unlike that gravity "pulls" bodies...

My understanding of Compton Scattering is that when a photon collides with a free electron, it will lose energy to the electron, and this loss of energy translates to an increase in the wavelength/reduction in frequency/red shift. If my understanding is correct, then what happens to a photon when...

It’s often said that the problem of time exists because time is treated as absolute in quantum mechanics but not so in General Relativity, see e.g. A list of inconveniences between quantum mechanics and (general) relativity?. However Quantum Field Theory merges QM with Special Relativity, which t...

I read that good absorbers are good emitters - hence a blackbody, that absorbs all kinds of radiation, also emits all kinds of radiation? I'm not able to get my head around this. What does it mean to absorb all kinds of radiation? Radiation of all frequencies? or are we saying that $100\%$ radiat...