Unit 1: Electromagnetic radiation and atomic Spectra

Question 1

Define Spectroscopy

Answer 1

The study of the interaction between matter and electromagnetic radiation

Question 2

Define Electromagnetic Radiation

Answer 2

Electromagnetic Radiation is a form of energy that includes visible light, heat and other radiations like x-rays and gamma rays.

Question 3

Long wavelength + Low frequency =

Answer 3

Low energy

Question 4

Short wavelength + High frequency =

Answer 4

high energy

Question 5

Give an example of low energy waves

Answer 5

Radio waves

Question 6

Give an example of high energy waves

Answer 6

Gamma rays

Question 7

Wavelength measures the?

Answer 7

distance between adjacent waves

Question 8

What is the symbol for wavelength?

Answer 8

λ

Question 9

Velocity of radiation or Speed is a constant, what is the symbol used?

Answer 9

C

Question 10

What are the units of measurements for λ?

Answer 10

Meters

Question 11

What are the units of measurement for c?

Answer 11

ms^-1

Question 12

Frequency measures what?

Answer 12

The number of wavelengths passing a fixed point per sec

Question 13

Give the symbol for frequency

Answer 13

f

Question 14

What is the symbol for wavenumber?

Answer 14

1/λ

Question 15

What are the units of measurements for frequency?

Answer 15

s^-1 or H_z

Question 16

What are the units of measurement for wavenumber?

Answer 16

cm^-1

Question 17

What is the equation used to relate veloctiy, wavelength and frequency?

Answer 17

c=λf

Question 18

What is the equation triangle that relates c,f,λ?

Answer 18

Question 19

To convert into meters for wavelength: 1nm =

Answer 19

1x10^-9m

Question 20

Conversion of wavelength into energy can be accomplished by using the equaiton:

Answer 20

E=hf

Question 21

Therefore to calculate energy, the combined equation that can be used is:

Answer 21

E = Lhc/λ