I can exist as a particle or a wave, yet I am neither until measured. What am I?

Category: Science · Difficulty: hard

Hint: I am essential for light and energy transfer.

Answer

Quantum state

Explanation

A photon is a quantum of light that exhibits both particle and wave properties, known as wave-particle duality.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Quantum state.

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