Chapter 5

Question 1

define spectroscopy

Answer 1

study of the interaction of radiant energy with matter

Question 2

define radiant energy

Answer 2

electromagnetic radiation

Question 3

define electromagnetic spectrum

Answer 3

range of different kinds of electromagnetic radiation

Question 4

How is the electromagnetic spectrum characterized

Answer 4

frequency
wavelength
amplitude

Question 5

define frequency

Answer 5

number of wave peaks per time unit (expressed in Hz or s)

Question 6

define amplitude

Answer 6

height of wave

Question 7

define wavelength

Answer 7

distance of 1 wave to the next

Question 8

how is speed calculated

Answer 8

wavelength x frequency = speed

Question 9

define photoelectric effect

Answer 9

irradiation of a clean surface with radiant energy above a threshold frequency causes electrons to be admitted

Question 10

define photons

Answer 10

small particles, whose energy (E) related to their frequency (or wavelengths)

Question 11

What is Plank’s Postulate

Answer 11

E=hv=hc/(wavelength)

Question 12

lower energy is formed from what level of frequency and wavelengths

Answer 12

lower frequency and longer wavelengths

Question 13

higher energy is formed from what level of frequency and wavelengths

Answer 13

higher frequency and shorter wavelengths

Question 14

define quantized

Answer 14

both matter and electromagnetic energy only occur in distinct amounts