Absorption of Light
Physics ⇒ Light and Optics
Absorption of Light starts at 9 and continues till grade 12.
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See sample questions for grade 12
A 1 cm thick sample has an absorption coefficient of 1.0 cm-1. What percentage of the incident light intensity is transmitted?
A beam of monochromatic light of intensity I₀ passes through a solution of thickness x. If the absorption coefficient is α, write the mathematical expression for the transmitted intensity I.
A certain dye has a maximum absorption at 500 nm. What color will the dye appear to the human eye?
A material transmits 25% of incident light. What is its absorbance?
A solution absorbs 90% of incident light at a certain wavelength. What is its transmittance at that wavelength?
A solution has a concentration of 0.2 mol/L, a path length of 1 cm, and a molar absorptivity of 100 L mol-1 cm-1. What is its absorbance?
A solution has an absorbance of 0.3 at a certain wavelength. If the path length is doubled, what happens to the absorbance?
A student shines a red laser through a blue solution and observes that little light passes through. Explain why this occurs.
Describe how the absorption of light is related to the color of a solution in a spectrophotometer experiment.
Describe the difference between selective and non-selective absorption of light.
Describe what happens to the energy of photons when they are absorbed by an atom.
Describe what is meant by an absorption spectrum.
Explain why a black surface appears black in terms of light absorption.
Explain why a green leaf appears black under red light.
Explain why a red shirt appears red under white light.
Explain why sunglasses are often tinted dark colors in terms of light absorption.
If a material has a high absorption coefficient, what does this indicate about its interaction with light?
The absorption coefficient of a material is 0.5 cm-1. What fraction of light intensity remains after passing through 2 cm of the material?
What is meant by the absorption of light in the context of optics?
