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IB Physics HL B 2 8 Infrared Absorption Questions

Practise IB Physics HL B.2.8 by analysing wavelength-selective infrared absorption, molecular energy levels and greenhouse re-emission.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Identify tension as the pulling force transmitted through a taut string, cable or rope, acting along its length.
  • Determine tension in connected-body systems from complete free-body diagrams, equilibrium or motion equations and mark-scheme evidence.

IB Physics HL B 2 8 Infrared Absorption Questions question 1

[Maximum number: 3]

There is a proposal to place a satellite in orbit around planet Mars.

The ratio  distance of Mars from the Sun  distance of Earth from the Sun =1.5\frac{\text { distance of Mars from the Sun }}{\text { distance of Earth from the Sun }}=1.5.

The atmosphere of Mars is composed mainly of carbon dioxide and has a pressure less than 1 % of that on Earth. Outline why the mean temperature of Earth is strongly affected by gases in its atmosphere but that of Mars is not.

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