spect.

Question 1

what range (nm) are most experiments measured in? which wavelengths are included?

Answer 1

200-1000
UV, visible, IR

Question 2

what is the highest and lowest energy?

Answer 2

highest: gamma, lowest: IR

Question 3

what is quantum?

Answer 3

amount of enrgy conatiined in a single photon

Question 4

what happens when exposed to ER?

Answer 4

electrons excited to higher energy levels

Question 5

planks constant equation

Answer 5

E= E1 - E2 = hv

Question 5

what happens energy wise when electrons are returned to ground state?

Answer 5

energy released as dissipation or emission spectrum

Question 6

what is the visible light wavelength range?

Answer 6

400 - 800 10-9

Question 7

why is white light polychromatic?

Answer 7

absorbs all wavelengths

Question 8

what happens to transmitted light intesnity as light is absorbed?

Answer 8

decreases

Question 9

how is absorption related to concentration/length of light path?

Answer 9

exponentially

Question 10

absorbance equation

Answer 10

A = log10 (I0/I) no units

Question 11

transmittance equation

Answer 11

I0/I = T%

Question 12

beer-lambert equation

Answer 12

A = E C L

Question 13

what lamps are used for visible and uv?

Answer 13

visible - tungesten filament
UV - deuterium discharge
cant run together

Question 14

cuvette law

Answer 14

if 1cm path, E is same for all then absorbance is proportinal to conc.

Question 15

what happens if sample is greater than calibration curve?

Answer 15

redilute, measure agaisnt conc. factor