42 Replies
why are we using u=ε 0E^2/2 isnt net energy u=ε 0E^2
@Gyro Gearloose
Note for OP
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wdym
emw net energy is u=ε 0E^2 na
what
pretty sure its half that
why like its half that + magnetic field contribution
since they both are equal should it not be simply u=ε 0E^2
no
wait
hmm
iirc U = e0E^2/2 = B^2/2u0
yes i am also a bit confused now
if someone answers ping me too
Ight
i asked chat gpt and it also said it will be e0E^2
but cant guarantee it is right
but ans is using 1/2 wala formula
ye i also never thought abt it
for reference go through example 8.5 of emwaves in old ncert
han what i am asking is energy bola hai toh i should give net na like you have written I due to E is e0E^2/2
maybe i am not getting it can you like explain it if that is not the case
energy contained in the cylinder is energy density
wait
? its not
lemme go thru the q
its that into volume
you use that and thats the energy of the wave right but you have to find the energy in the cylinder so you multiply it with volume
are you asking why its 1/2 there
bruh but my doubt is that net energy has equal contribution of magnetic and electric when you have written energy density due to E it's not net energy density na
yes
got it
one sec lemme write it down and send
do you get it rn?
that sin function becomes variable hence we take the avg value
ok i got it also can you resend the second pic it's illegible but point is clear from the 1st one
one sec
ngl brought a tear to my eyes
pouring honey over you my goat
@Gamertug
ill close after they are done with it incase they find some issue
okay and this is also explained in that image you sent of hcv, infact the same example is there as your q and there are similar examples/qs on this in the exercise so you can go thru that
ok wow i got stun locked on the above portion i didn't see that 😭
feeling hella dumb ngl
happens 🫂
oooh daymn
i get it now
lmAO
bhery cool thank u i learnt something new
+solved @trin
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