h is Planck's constant. Provided on your exam data sheet (

**6.626x10**-**34**J.s) This equation is said to define the relationship between energy and frequency in a black body. A black body is an object that is both a perfect absorber and emmitter – absorbing all incident radiation and emitting all possible radiations.Moreover, what does the H in E HV stand for?

PhysicsMatters.org: Quantum: E=hv. This equation says that the

**energy**of a particle of light (E), called a photon, is proportional to its frequency ( ), by a constant factor (h). This means that photons with low frequencies, like radio waves, have lower energies than photons with high frequencies, like x-rays.What is H equal to in e HV?

Planck's constant is always going to be 6.626x10^-34 J s. And it's

**h**. Upper case**H**is enthalpy in chemistry, not sure what it is in physics.**E**=**hv**tells you that the energy of a photon/quantum is**equal**to Planck's constant,**h**, times nu (which**is the**frequency of a wave).What is E in Planck's equation?

The

**equation**that defines**Planck's**constant is called the**Planck**-Einstein relation, and it looks like this:**E**= hf. Here,**E**is the energy of each packet (or 'quanta') of light, measured in Joules; f is the frequency of light, measured in hertz; and h is of course**Planck's**constant.