UV Vis

Question 1

the study of the absorption and emission of light and other radiation by matter

Answer 1

SPECTROSCOPY

Question 2

the measurement of the interactions between light and matter, and the reactions and measurements of radiation intensity and wavelength

Answer 2

SPECTROMETRY

Question 3

the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength

Answer 3

SPECTROPHOTOMETRY

Question 4

name the 5 Basic Interactions of Light and Matter

Answer 4

2R SAD
Reflection
Refraction
Scattering
Absorption
Diffraction

Question 5

particles are moved from their normal room temperature state, or ___________, to one or more higher-energy excited states.

Answer 5

ground state

Question 6

identify the light-matter interaction

electromagnetic energy is transferred to the atoms, ions or molecules of the sample when radiation passes through a layer of solid, liquid or gas

Answer 6

ABSORPTION OF RADIATION

Question 7

identify the light-matter interaction

electromagnetic radiation is produced when excited particles (atoms, ions or molecules) relax to lower energy levels by giving up their excess energy as photons

Answer 7

EMISSION OF RADIATION

Question 8

4 causes of radiation emission

Answer 8

(1) bombardment with electrons or elementary particles, which leads to emission of X-radiation
(2) exposure to an electric current or intense heat source producing UV, visible or IR radiation
(3) irradiation with a beam of electromagnetic radiation
(4) an exothermic chemical reaction that produces chemiluminescence

Question 9

________ reaction causes chemiluminescence

Answer 9

exothermic

Question 10

electromagnetic radiation is transmitted at all angles from the original path

Answer 10

SCATTERING OF RADIATION

Question 11

usually observed when atomic or molecular particles are small relative to the wavelength of the radiation

Answer 11

SCATTERING OF RADIATION

Question 12

a parallel beam of radiation is bent as it passes by a sharp barrier or through a narrow opening

Answer 12

DIFFRACTION OF RADIATION

Question 13

large wavelength = (small/large) diffraction

Answer 13

large

Question 14

type of energy that is commonly known as light

Answer 14

ELECTROMAGNETIC RADIATION

Question 15

ELECTROMAGNETIC RADIATION is formed by _______ and _______

Answer 15

Electric Field Oscillation + Magnet Field Oscillation

Question 16

ELECTROMAGNETIC RADIATION is propagated in how many field/s

Answer 16

2

Question 17

model showing wavelength, frequency, velocity, and amplitude

Answer 17

sinusoidal wave model

Question 18

model where ER is viewed as a stream of discrete particles, or wave packets, of energy called photons

Answer 18

particle model

Question 19

represented by A

Answer 19

amplitude

Question 20

represented by p

Answer 20

period

Question 21

represented by v

Answer 21

frequency

Question 22

represented by λ

Answer 22

wavelength

Question 23

in /sec, sec-1, Hz

Answer 23

frequency

Question 24

value of speed of light

Answer 24

3.00x10^8 m/s

Question 25

in meters/nanometers

Answer 25

wavelength

Question 26

The energy of a photon absorbed or emitted during a transition from one molecular energy level to another is given the equation E = hv. What theory?

Answer 26

QUANTUM THEORY

Question 27

value of Planck’s constant

Answer 27

6.62x10-34 Js

Question 28

in joules

Answer 28

energy