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Saladin:
1. Distinguish between line spectra and continious spectra
2. Emission spectra and absorption spectra
3. Excitation and ionisation.

I know the answers to all of them, but I just want to check with all u guys.

astarmathsandphysics:
1. Distinguish between line spectra and continious spectra - continuous spectra occupies an interval of wavelengths but a line spectra is only for certain wavelengths
2. Emission spectra and absorption spectra - imposed on a continuous spectra, an emission spectra will be peaks and a line spectra troghs. Emission spectra are emitted by excited atomes decaying. Absorption spectra are due to electrons becoming excited.
3. Excitation and ionisation. Excitation - electrons move to a higher energy level. Ionisation - electrons are ejected from the atom/.

Saladin:
A perfect answer-------as usual......

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