Unit 1: Electromagnetic radiation and atomic Spectra Flashcards Preview

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Flashcards in Unit 1: Electromagnetic radiation and atomic Spectra Deck (22)
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1

Define Spectroscopy 

The study of the interaction between matter and electromagnetic radiation 

2

Define Electromagnetic Radiation

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

3

Long wavelength + Low frequency = 

Low energy 

4

Short wavelength + High frequency =

high energy 

5

Give an example of low energy waves

Radio waves

6

Give an example of high energy waves 

Gamma rays 

7

Wavelength measures the?

distance between adjacent waves

8

What is the symbol for wavelength?

λ

9

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

C

10

What are the units of measurements for λ?

Meters 

11

What are the units of measurement for c? 

ms-1

12

Frequency measures what?

The number of wavelengths passing a fixed point per sec 

13

Give the symbol for frequency

f

14

What is the symbol for wavenumber?

1/λ

15

What are the units of measurements for frequency?

s-1 or Hz

 

16

What are the units of measurement for wavenumber?

cm-1

17

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

c=λf

18

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

19

To convert into meters for wavelength: 1nm =

1x10-9m

20

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

E=hf

21

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

E = Lhc/λ

22