A broad category referring to the study of the physical universe including nature and biology.




The Bed of Nails Principle

The bed of nails principle states that while laying on one nail is enough to puncture a person’s skin, laying on many distributed nails isn’t.





All Waves Transfer Energy Fact

All waves (including sound waves, electromagnetic waves, and even water waves) transfer energy, and all energy is transferred in a wave-like motion.




What is Light?

“Light” is a particle (photon), that acts like a wave, and is understood as a localized vibration in the electromagnetic field.