Edexcel IGCSE Physics 8.8 star colour and temperature
Practise star-colour questions by ranking temperatures from colour data and explaining why red stars are cooler than yellow or blue stars.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- Use star colour or spectral-class data to order stars by increasing surface temperature.
- Explain that a red star is cooler than a yellow, white or blue-white star in table data.
8.8 Star colour and temperature question 1
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.
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