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Beer-Lambert Law and Earth’s Atmosphere


As an undergraduate Chemistry teacher, you can use this set of computer-based tools to teach the Beer-Lambert Law and its application in atmospheric radiation absorption studies.

This lesson plan will enable students to learn about the Beer-Lambert Law and understand its application for studying the molar absorptivity of greenhouse gases.

Thus, the use of this lesson plan allows you to integrate the teaching of a climate science topic with a core topic in Chemistry.

Learning Outcome

The tools in this lesson plan will enable students to:

  1. Derive the expression for Beer-Lambert Law
  2. Define molar absorptivity/molar absorption coefficient/molar extinction coefficient of a medium
  3. Calculate the effect of concentration of a chemical species and path length on the intensity of transmitted light
  4. Understand the effect of increasing concentrations of atmospheric greenhouse gases on absorbance of incident sunlight

A teacher-contributed lesson plan by Dr. Pragya Gahlot and Dr. Rekha Yadav, Sri Venkateswara College (University of Delhi), India.

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