1)

Plot a graph of frequency (on the vertical axis) against temperature (on the horizontal axis) for the position of the peak in the continuous black-body emission spectrum, based on the spectra emitted by seven different star types: O, B, A, F, G, K and M.

Your graph should have a best-fit line plotted through the data points, and could be hand-drawn or computer-generated.

2)

Provide an appropriately titled and labelled table of the data you obtained from the data you used to plot your graph. ( see attached photos )

Hint: Be sure to check that all required aspects of a well-formatted graph are included in your answer, and that you have plotted frequency on the vertical axis and temperature on the horizontal axis.

3)

A star is measured to have a blackbody spectrum that peaks at 1400 THz.

Use your graph to determine the surface temperature of the star.

Briefly describe the steps you took to obtain your answer from your graph.

data plots for graph below:

Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous black body spectrum they emit and an image of a representative star. Relative flux 1 500000 T: 40000 K [:2] 1 000000 500 000 0.6 0.8 1 1.2 Wavelength / pm Q Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 0 stars e.g. Mintaka (Orion's belt)_ B stars e.g.Fligi (also in Orion) A stars e.g. Sirius F stars e.g. Canom G stars e.g. the Sun K stars e.g. Arcturus M starseg. Betelgw Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous black body spectrum they emit and an image of a representative star. Relative flux 60000 T = 20000 K Q [1:] @0000 40000 30000 20000 10000 0 0.2 0.4 0.6 0.8 1 1.2 Wavelength lpm Q Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 0 stars e.g. Mintaka (Orion's belt)_ B stars e.g.Fligi (also in Orion) A stars e.g. Sirius F stars e.g. Canow G stars e.g. the Sun K stars e.g. Arcturus M starseg. Betelgw Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous black body spectrum they emit and an image of a representative star. Relative flux T: 9000 K El [1:] Q 800 600 400 200 o 0.2 0.4 7 0.6 0.8 1 1.2 Wavelength lpm Q Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 0 stars e.g. Mintaka (Orion's belt) B stars e.g.Rigioalso in Orion) A stars e.g. Sirius F stars e.g. Canow G stars e.g. the Sun K stars e.g. Arcturus M stars, e.g. Betelgw Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous black body spectrum they emit and an image of a representative star. ,_. Relative flux T: 7000 K Q [1:] 69' 200 150 100 50 o 0.2 0.4 _ 0.6 0.8 1 1.2 Wavelength / um Q Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 0 stars e.g. Mintaka (Orion's belt)_ B stars e.g.Rigmlso in Orion). A stars e.g. Sirius F stars e.g. Canom (3 stars e.g. the Sun K stars e.g. Arcturus M starseg. Betelgw Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous black body spectrum they emit and an image of a representative star. Relative flux e 69' 100 80 T: 5800 K [1:] 60 40 20 0 0.2 0.4 0.6 0.8 1 1.2 Wavelength / pm Q 2 Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 1 0 stars e.g. Mintaka (Orion's belt)_ B stars e.g.Riga (also in Orion)_ A stars e.g. Sirius F stars e.g. Canopu_s G stars e.g. the Sun K stars e.g. Arcturus M stars, e.g. Betelgggse Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous black body spectrum they emit and an image of a representative star. Relative flux T = 4000 K Q *4 [1:] Q 12 ,5 10 0 0.2 0.4 0.6 0.8 1 1.2 Wavelength /pm a Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 0 stars e.g. Mintaka (Orion's belt)_ B stars e.g.Rigimlso in Orion) A stars e.g. Sirius F stars e.g. Canow G stars e.g. the Sun K stars e.g. Arcturus M starseg. Betelgw Below we present examples of stars of a given spectral type. Select each star in turn to see the mean temperature of the stars of that spectral type, the continuous btack body spectrum they emit and an image of a representative star. Relative flux T: 3000 K Q (o 69' 3 2.5 1.5 0.5 0 0.2 0.4 7 0.6 0.8 1 1.2 Wavelength l/Jm Q Adjust the temperature slider above to see how intensity and wavelength of radiation varies, or choose a star type below. You may need to adjust the y- axis scale using the zoom in and out buttons in order to see the peak of the curve clearly. 0 stars e.g. Mintaka (Orion's belt)_ B stars e.g.Rigmlso in Orion) A stars e.g. Sirius F stars e.g. Canorm G stars e.g. the Sun K stars e.g. Arcturus M starseg. Betelgw