J - Introduction to Spectroscopy

Question 1

spectroscopy

Answer 1

The study of the interaction of electromagnetic radiation with a chemical species

Question 2

qualitative spectroscopy

Answer 2

try to determine what is in a sample by looking at overall line shapes, intensities, and the wavelengths at which they occur

Question 3

quantitative spectroscopy

Answer 3

try to determine how much of a given component is present in a mixture

Question 4

what is I o

Answer 4

intensity of the incident radiation

Question 5

what is I

Answer 5

intensity after passage through the sample

Question 6

what is T

Answer 6

The amount transmitted/transmittance

Question 7

how do you calculate transmittance

Answer 7

T = I/IO

Question 8

how do you calculate the percent transmittance

Answer 8

%T = (I/IO) x 100

Question 9

what is A

Answer 9

absorbance

Question 10

how to calculate absorbance

Answer 10

A = log(1/T)

Question 11

what does A = a b c

stand for?

Answer 11

A = absorption
a = absorption coefficient
b = path length
c = concentration of the absorbing material

Question 12

what does the E in
A = E b c
stand for

Answer 12

E = molar absorptivity

The wavelength is written as a subscript