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Is it 4 m/s?
actual velocity of fly=3.75m/s
We know that, Speed of light in air / Speed of light in water = 4/3 Or, 3 * 10^8 / x = 4/3 Or, x = 2.25 * 10^8 Now, 2.25*10^8 = 3 So, 3*10^8 = 3/(2.25 * 10^8) * 3*10^8 = 9/2.25 = 4
Not getting how it is 3.75 m/s
wait hw is 2.25*10^8=3?
I just equated for the sake of unitary method, since fish is in water. It may be wrong.
ok the ray refracts twice so?
so, get me the refractive index of Glass...
arre book mein dheko na
oh..i dont hav a book mein 10th mein hoon just passed this prob is frm a sample paper
Given taht R.F. of water is 4/3. Glass refractive index = 1.52(crown glass)
acc. to google it is 1.52
yeah and fr flint glass it is 1.62
For the fish, the apparent distance of the fly from the wall of the aquarium is µx, where µ is the R.I. of water and x is the actual distance, then apparent velocity will be . Therefore, actual velocity of fly = (8 – 3) * (3/4) = 3.75 m/s. This is the sol. given can u explain this?
Check in 10th NCERT, crown glass' R.F. is 1.52
yeah i know that i just told fr flint glas it is 1.62
so salini,ishaan,aadarsh can a ny of u explain the above sol.?
Oh, don't consider Glass, you will have to ignore Glass, my bad :/
btw Glass can't be ignored in real life
ok so what to do nw?
|dw:1332858159715:dw|Apparent Velocity of fly = 8-3.
because the apparent velocity is from the frame of reference in water.
ok 1 more..
u have to have an idea abt relative velocity ie velocity of f fly with res[pect to velocity of fish(since both are moving) Vfly-Vfish=relative velocity of fly with respect to fish in water i think u can figure out the rest
IN WATER CONDITION is wat i have discussed above so do the same thing in air using R.I multiply by 3/4
can u pls xplain why i hav to divide by refractive index
wat is R.I? DID u understand the relative velocity part(it is nothing but how the fish sees the fly when it is moving)
refractive index ya i understood the r.v part
right wat is the expression?
expression fr wat?
refractive index of medium 1 with respect to medium 2?
it is speed of light in medium 2/speed of light in medium 1 =r.i of medium 2 use this and put the values u
@salini sry gtg can u pst solution and i shall se it tom
thts ball u gotto work out with the expressions i gave remember it is velocity of fly in water (actual) that i gave u with relative velocity concept bye! my god this site is very slow!
|dw:1332861296812:dw|so when u do the pproblem Vmf is only given Vmf=Vm-Vf 8=Vm-(-3) that is how it is 5m/s velocity of moth in water