Brightness And Blackbody Radiation

Question 1

Sources of gamma rays

Answer 1

Produced in nuclear reactions

Question 2

Sources of x rays

Answer 2

Gas in clusters of galaxies, supernova remnants, solar corona

Question 3

Sources of UV

Answer 3

Supernova remnants, very hot stars

Question 4

Sources of visible radiation

Answer 4

Stars

Question 5

Sources of infrared

Answer 5

Cool clouds of dust and gas, planets, moons

Question 6

Sources of microwave

Answer 6

Active galaxies, pulsars, cosmic background radiation

Question 7

Sources of radio

Answer 7

Supernova remnants, pulsars, cold gas

Question 8

Measures of brightness

Answer 8

Luminosity, flux

Question 9

What is black body radiation

Answer 9

The ideal form of radiation in which an on neck absorbs all radiation coming into it causing atoms to heat up and re radiate the energy until there is a balance between absorption and emission

Question 10

The branch of science concerned with the investigation and measurement of spectra produced when matter interacts with or emits electromagnetic radiation

Answer 10

Spectroscopy

Question 11

How do we break up light into its components

Answer 11

Prism or diffracting grating

Question 12

Continuous spectrum

Answer 12

All colors present: emitted by a solid or very dense gas

Question 13

Absorption spectrum

Answer 13

Some dark lines and bands on an otherwise continuous spectrum: looking at white light through a layer of cool thin gas

Question 14

Emission spectrum

Answer 14

Only a few bright lines and bands, emitted by a thin hot gas

Question 15

Who said matter is a fundamental building block called the atom

Answer 15

Leucippus, Democritus

Question 16

Who said matter was made up of combinations of four elements

Answer 16

Aristole

Question 17

Who discovered the electron using the plum pudding model saying electrons were small particles floating in a sea of diffuse positive charge

Answer 17

JJ Thomson

Question 18

What was the Rutherford experiment

Answer 18

Rutherford shot alpha particles at a super thin layer of gold foil and found that the nucleus of an atom is positive

Question 19

Niels Bohr

Answer 19

Electrons could occupy only discrete energy levels around a nucleus

Question 20

Who found the atom

Answer 20

John dalton

Question 21

How do we find spectra

Answer 21

Let light pass through a prism or diffraction grating, by doing this we separate light into different wavelengths

Question 22

Which type of spectrum comes directly from a black body

Answer 22

Continuous

Question 23

Which type of spectrum comes from observing a warm diffuse

Answer 23

Emission

Question 24

Which type of spectrum comes from looking at a black body through a cool layer of gas

Answer 24

Absorption

Question 25

Which type of spectrum is emitted by the sun

Answer 25

Absorption