CAIE IGCSE Physics Factors Affecting Emission Rate
Practise predicting infrared emission rate from surface temperature and area, while separating these effects from colour and texture comparisons.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- predict a higher emission rate from an object with a higher surface temperature
- predict greater total emission from a larger surface area at the same temperature
- combine area and temperature with dull or shiny texture when ranking several objects
2.3.3.9—Rate of emission of radiation depends question 1
[Maximum number: 1]
Star X has a larger diameter than star Y but they both emit radiation with the same power.
Which statement is correct?
A
The surface temperature of X is less than the surface temperature of Y.
B
The surface temperatures of X and Y are the same.
C
The surface temperature of X is greater than the surface temperature of Y .
D
The surface areas of X and Y are the same.
A
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