2. Stars

Question 1

Units of Temperature

Answer 1

Kelvin

Question 2

Celsius to Kelvin

Answer 2

+ 273

Question 3

Black body

Answer 3

A perfect radiator and absorber, it emits and absorbs at the same rate

Question 4

Stefan Boltzmann Law

Answer 4

Luminosity = Surface Area x SB constant x (Temperature)⁴

Question 5

Stefan Boltzmann Constant

Answer 5

5.67 x 10(-8)

Question 6

Wiens law

Answer 6

Peak wavelength = Weins constant / Temperature

Question 7

Wiens constant

Answer 7

2.90 x10(-3)
Metre - kelvins

Question 8

Wave characteristic graph

Answer 8

Y axis = Intensity
X axis = Wavelength

Question 9

Visible light wavelength

Answer 9

400nm - 700nm

Question 10

Inverse Square law

Answer 10

Intensity = Luminosity / 4(pi) x (Distance from earth to star)²

Question 11

Multiwavelength astronomy

Answer 11

Helps to process images of different light
Taken using different parts of the EM spectrum

Eg. James Webb Telescope uses Infrared

Question 12

Continuous spectrum

Answer 12

The stars emit all different gases from the surface at all frequencies - a no gaps spectrum

Question 13

Absorption spectrum

Answer 13

When the light emitted from a star passes through the gases in its atmosphere some photons can be absorbed and scattered. This leaves absorption line and also jagged lines on a wave characteristic graph.

Question 14

Binary solar system

Answer 14

The same solar system

Question 15

What qualities are used to classify stars

Answer 15

Size
Luminosity
Temperature
Distance

Question 16

What is multiwavelength astronomy

Answer 16

Using equipment that use other waves from the spectrum to observe stars that dont emit visible light