The frequency of a wave does not change as it passes from one medium to another. What will most likely happen if a light wave moves from the air into a solid? The wavelength of the light wave will increase. The speed of the light wave will decrease. The wavelength of the light wave will remain the same. The speed of the light wave will remain the same.

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

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there are two significant figures.