Why Does a Green Glass Plate Absorb Everything Except Green?

AI Thread Summary
A pure green glass plate absorbs all wavelengths of light except for green, which is why it transmits that color when white light passes through it. The confusion arises from the comparison to absorption spectra observed with sodium vapor, where specific wavelengths are absorbed, resulting in dark lines. The green glass does not absorb green light because it is designed to transmit that specific wavelength. Thus, the statement in the book is correct; the glass absorbs everything except green. This principle highlights the selective absorption properties of colored glass in relation to white light.
logearav
Messages
329
Reaction score
0

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

 
Physics news on Phys.org
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.
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Continuous absorption spectrum - why this happens?
Replies
4
Views
2K
I Confusion about absorption spectra - cool gases absorb?
Replies
17
Views
7K
I Only certain emission lines show up in absorption spectrum
Replies
4
Views
2K
Why Are Absorption Lines Observed Only in the Lyman Series for Hydrogen?
Replies
4
Views
7K
Too Much Stellar Flux: Fixing a 25-year old Problem
Replies
9
Views
3K
Why Do Absorbance Values Change in the Difference Spectrum of 4-Nitrophenol?
Replies
1
Views
7K
Mathematica This Week's Finds in Mathematical Physics (Week 259)
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top