IIT JEE , AIEEE Forum - Physics , Optics

ashgirl

how does the critical angle depend on colour of light?

madman

in a medium other than vaccum all the collours travel with different velocities.
since velocity is inversely proportional to refractive index critical angle varies with the colour

Radon222

Critical angle is inversely proportional to "u" and "u" is inversely proportional to wavelength of light, this means critical angle increases with increase in wavelength ,therefore the critical angle for red light is more than for violet light.

dheer_07

these r bit confusing but i clarify

focal length and wavelengthh both r inversely prop to ref index

n sinc is inverse of ref index

hope u got it

plz rate if useful!!

suresan

You can workout the crutical(c) from the equation

Sin c = 1/ (A + B/ l^2)
Where A and B are empirical constants l is the wave length and c is the critical angle.

eistien

sinC = 1/(A+B

) this the varition principle between wavelength and critical angle where A and B are constants!!! as

varies so does critical angle for diff colours!!!

computer001

srini according to u and suresan sir,the variation of critc.ang wid wavelength not the same ..so pl chkup

and its not a "spelling " mistake 4 heavens sake...
its a CONCEPTUAL BLUNDER

eistien

wht?? i didnt understand what you mean????

oh i made a spelling mistake it is sinC=1/(A+B/

) sorry now is it rite???

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