energy levels
How tired someone is
Energy levels refer to the amount of physical or mental vitality a person has at a given time: My energy levels are low in the afternoon, Coffee helps boost my energy levels.
In physics, energy levels are the discrete states an electron can occupy in an atom—a foundational concept in quantum mechanics.
The everyday sense borrows from this scientific usage, treating personal vigor as something that rises and falls on a measurable scale.
- orbitalsElectron probability distributions
- quantum mechanicsPhysics at nanoscopic scales
- electronNegative subatomic particle
- spectral linesDiscrete wavelength emission patterns
- atomic orbitalsRegions of electron probability
electron shells · quantum · quantum leap · excitation · atomic transitions · wavefunction · spectroscopy · emission · absorption · Schrödinger equation · fluorescence · wired · photon · sluggish · caffeine · adrenaline · boost · second wind
- wellnesshealthy, wellness, fitness, exercise, nutrition
- wellness indicatorslife satisfaction, happiness index, physical health, sleep quality, self-esteem
- excitationsquasiparticles, singlet state, quantum states
- energyelectricity, power, oil, fuel, gas
- atomic physicsatom, atoms, atomic nucleus, electron, atomic number
- chemistryatom, atoms, organic chemistry, molecule, chemistry
energy levelsfatigue
Weariness from prolonged exertion
exhaustion · lethargy · tiredness · depletion · weariness
level, energy, energetic, energize, levels, energizing, energized, energetically, energizer