EL2

Question 1

Spectroscopy

Answer 1

the study of how light and matter interact

Question 2

Wave theory of light

Answer 2

form of ER so has a wavelength and frequency, waves can have different wavelengths and frequencies

Question 3

Speed of light

Answer 3

300,000,000ms(-1) in a vacuum

Question 4

Particle theory of light

Answer 4

photons (light particles) are volumes of energy, the energy of the photon is related directly to the position of the light on the electromagnetic spectrum

Question 5

Bohr’s theory

Answer 5

the electrons in an atom only exist in certain definite energy levels
a photon of light is emitted or absorbed when an electron changes from one energy level to another
energy of the photon is equal to the difference between the two energy levels (delta E)

Question 6

emission spectra

Answer 6

black with exception to the coloured frequencies of light emitted by atoms of the element

Question 7

absorption spectra

Answer 7

black lines in an otherwise continuous spectrum, lines correspond to the frequency of light absorbed by atoms of the element

Question 8

intensity of lines in emission/absorption spectra

Answer 8

indicates element’s abundance