04-Light, Atoms, and Radiation

Question 1

combination of electric and magnetic waves

Answer 1

Electromagnetic (EM) Radiation which can be separated into an EM spectrum

Question 2

List the EM spectrum from the smallest wavelengths to largest (6)

Answer 2

1. Gamma Ray
2. X-Ray
3. Ultraviolet
4. Visible
5. Infrared
6. Microwave
7. Radio

Question 3

What are the colours of visible light?

Answer 3

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Question 4

period between waves (lamda)

Answer 4

wavelength

Question 5

a quantum (smallest) bundle of electromagnetic waves.

Answer 5

photon

Question 6

what the visible light wavelengths?

Answer 6

400nm (blue)-700nm (red)

Question 7

between 700nm-1mm. Beyond the range of human eyes but felt as heat

Answer 7

infrared

Question 8

shorter than violet wavelength, so shorter than 400nm

Answer 8

ultraviolet

Question 9

stored energy in matter

Answer 9

heat

Question 10

measure of agitation among particles

Answer 10

temperature

Question 11

temperature scale starting at absolute zero

(theoretically lowest possible temperature (-273c = 0K), no extractable energy remains)

Answer 11

Kelvin (K) temperature scale

Question 12

Emission spectrum. A hypothetical perfect radiator.

Answer 12

blackbody radiation

Question 13

a law that states hotter objects emit more energy than cooler of the same size. Intensity is in proportion to fourth power of temperature

Answer 13

Stefan-Boltzmann Law

Question 14

a law that states the hotter the object, the short the wavelength max and is inversely proportional to its temperature. (ex. cooler object emits less photons and are redder)

Answer 14

Wien’s Law

Question 15

can reveal object motion. Source wavelength change compressed light waves (travelling toward observer) are bluer = blushift. Stretched light waves travelling away from observer are redder = redshift

Answer 15

Doppler Effect

Question 16

the force of attraction between two opposing charges, i.e., protons and electrons

Answer 16

Coulomb Force

Question 17

electron above ground state or another energy level is:

Answer 17

excited

Question 18

transition move to permitted orbit shells

Answer 18

spectral ine

Question 19

the continuous full spectrum that emits light at all wavelengths.

Answer 19

Continuous Spectrum

Question 20

Photons emitted by low-density gas. bright light spectra

Answer 20

Emission Spectrum

Question 21

Light pass through cool low-density gas. Dark light spectra

Answer 21

Absorption Spectrum