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IB Physics HL B 2 5 Solar Constant S Questions

Practise IB Physics HL B.2.5 by defining the solar constant and evaluating why its average value varies with orbit, output and measurement.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Identify normal reaction, friction, tension, elastic restoring force, viscous drag and buoyancy as contact forces between bodies.
  • Select and represent the appropriate contact force, direction and model for a stated physical situation using complete mark-scheme evidence.

IB Physics HL B 2 5 Solar Constant S Questions question 1

[Maximum number: 1]

The diagram shows a simplified energy-balance model for the Earth surface-atmosphere system.

Figure for Question IB Physics HL B 2 5 Solar Constant S Questions question 1 — IB Physics HL

The following data are given:

 Average albedo of Earth =0.30 Average global temperature of the surface =288 K Average Earth-Sun distance =1.5×1011 m\begin{aligned} \text { Average albedo of Earth } & =0.30 \\ \text { Average global temperature of the surface } & =288 \mathrm{~K} \\ \text { Average Earth-Sun distance } & =1.5 \times 10^{11} \mathrm{~m} \end{aligned}

State what is meant by the solar constant.

The diagram shows a simplified energy-balance model for the Earth surface-atmosphere system.

The following data are given:

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