A short pulse of white light is incident from air to glass slab at normal incidence . After travelling through slab , the first colour to emerge will be ?
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Heya.......!!!!
As the velocity of wave is given by relation
v = f×λ , When light ray goes from one medium to another , the frequency remains same , Hence v is propotional to λ Or greater the wavelength , greater the speed .
The light of red colour is of highest wavelength and therefore of highest speed , therefore after travelling through slab , the red colour emerges first .
Hipe it helps u :-)
As the velocity of wave is given by relation
v = f×λ , When light ray goes from one medium to another , the frequency remains same , Hence v is propotional to λ Or greater the wavelength , greater the speed .
The light of red colour is of highest wavelength and therefore of highest speed , therefore after travelling through slab , the red colour emerges first .
Hipe it helps u :-)
Answered by
0
The emerging light would be red.
Frequency and speed relation
The emerging light would be red, in view of the relation;
v=f÷λ
here, f = frequency and
λ = wavelength.
which gives the speed of a wave. During the changing of the mediums, the recurrence of the wave stays consistent.
Along these lines, v=f÷λ
frequency, λ is straightforwardly relative to speed.
As red tone has the highest frequency in the spectra, it likewise has the most speed as per the relation.
Consequently, when the light goes into the glass piece, the main colour arises as red.
(#SPJ2)
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