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10 questions from this quiz
Light from a fluorescent tube through a prism
Contains discrete wavelengths only
Quantised energy levels in atoms
White light passed through a cooled gas
Wavelengths absorbed by the gas atoms
ΔE=E1−E2\Delta E = E_1 - E_2ΔE=E1−E2
hf=E1−E2hf = E_1 - E_2hf=E1−E2
Planck's constant
1.91.91.9 eV
They emit or absorb photons of specific energy
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