The Production of Spectra (HSC SSCE Physics): Flashcards

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The Production of Spectra
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Dispersion of light

Separation of light into component colours

Emission spectrum appearance

Bright coloured lines on dark background

Absorption spectrum appearance

Dark lines on bright continuous background

Source of continuous spectrum

Hot, dense objects (e.g., star cores, incandescent bulbs)

What does EE represent in E=hfE = hf

Energy difference between two energy levels

Wien's Displacement Law formula

λmax=bTmax\lambda_{max} = \frac{b}{T_{max}}

Cause of redshift

Doppler effect - source moving away stretches wavelengths

ROY G BIV meaning

Red, Orange, Yellow, Green, Blue, Indigo, Violet (colour order)

Excited state of an atom

Electron has jumped to higher energy level

Planck's constant value

h=6.63×10−34h = 6.63 \times 10^{-34} J s

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