Why Does a Green Glass Plate Absorb Everything Except Green?

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SUMMARY

A pure green glass plate absorbs all wavelengths of light except for green, which is transmitted. This phenomenon is due to the specific absorption characteristics of the glass material, which selectively allows green light to pass while absorbing other colors in the spectrum. The confusion arises from the comparison with sodium vapor's absorption spectrum, where specific wavelengths are absorbed, leading to dark lines. In contrast, the green glass does not absorb green light, thus allowing it to be visible when white light passes through.

PREREQUISITES
  • Understanding of light absorption and transmission principles
  • Familiarity with continuous absorption spectra
  • Knowledge of the electromagnetic spectrum, particularly visible light
  • Basic concepts of spectrometry and wavelength measurement
NEXT STEPS
  • Research the properties of colored glass and its interaction with light
  • Study the principles of absorption and emission spectra in detail
  • Learn about the role of sodium vapor in spectroscopy and its absorption lines
  • Explore the concept of selective absorption in different materials
USEFUL FOR

Students studying optics, physics educators, and anyone interested in the principles of light absorption and color theory.

logearav
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Homework Statement


While dealing with continuous absorption spectrum, my book depicts like this
" A pure green glass plate when placed in the path of white light, absorbs everything except green and gives continuous absorption spectrum"


Homework Equations




The Attempt at a Solution


I don't understand this, because i have studied when light from the carbon arc is made to pass through sodium vapour and then examined by a spectrometer, a continuous spectrum of carbon arc with two dark lines in the yellow region is obtained.
So, since sodium vapour emit wavelength of 5896 Armstrong 5890 Armstrong, yellow lines of carbon arc spectrum are absorbed and those lines are absent in the absorption spectrum.
If that's the case then the statement in my problem statement sounds wrong. A pure green glass plate should absorb green colour present in white light. But it is given, everything is absorbed except green.
Am i interpreting wrong or the book is wrong? Please help members

 
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logearav said:

Homework Statement


While dealing with continuous absorption spectrum, my book depicts like this
" A pure green glass plate when placed in the path of white light, absorbs everything except green and gives continuous absorption spectrum"


Homework Equations




The Attempt at a Solution


I don't understand this, because i have studied when light from the carbon arc is made to pass through sodium vapour and then examined by a spectrometer, a continuous spectrum of carbon arc with two dark lines in the yellow region is obtained.
So, since sodium vapour emit wavelength of 5896 Armstrong 5890 Armstrong, yellow lines of carbon arc spectrum are absorbed and those lines are absent in the absorption spectrum.
If that's the case then the statement in my problem statement sounds wrong. A pure green glass plate should absorb green colour present in white light. But it is given, everything is absorbed except green.
Am i interpreting wrong or the book is wrong? Please help members

What color would you see at the end of where the white light passes through the glass ?
 
No, i can't understand your query. I assume green colour alone should be absorbed.
 

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