EduNinjaKnow that a star’s colour is related to its surface temperature
This question is about stars.
Physicists classify stars according to their colour.
Each group of stars of similar colour is called a spectral class.
The table gives information about colour and surface temperature for three spectral classes of stars.
The Sun belongs to spectral class G.
Complete the table by suggesting values for the missing surface temperatures.
This question is about stars.
The table gives information about four different stars.
Which of these stars has the lowest surface temperature?
Betelgeuse
Sirius A
Sirius B
The Sun
This question is about the Sun.
When viewed from Earth, the surface of the Sun is yellow in colour.
The surface of another star, Betelgeuse, is red in colour.
Explain the difference between the Sun and Betelgeuse, based on the different colours of their surfaces.
Table 1 shows the colour of some stars.
Table 1
Complete table 2 by giving the stars in order of increasing surface temperature. The hottest star, Rigel, has been done for you.
Table 2
The student extends the investigation by recording additional data for the lamp.
This is her method.
For each voltage
- switch the current on for 45 seconds
- record the current and colour of the lamp
- calculate the power and the energy transferred by the lamp
The table shows the student's results.
The colour of a star is related to its surface temperature.
The Sun is yellow.
Use the student's results to identify a colour for a star that is cooler than the Sun.
The table gives information about four stars.
Explain which of these stars has the highest surface temperature.