Answer : Question 27
a) i) optical fibre is denser than air, ray is refracted towards normal
ii) Total internal reflection(T.I.R) occur , where angle of critical more than critical angle
b) draw a ray going away 
from normal at B
c)
* endoscope
* cables for transmission of telephone signals…you broadband also uses this
3 comments:
question 5)
b. iv) is 25m/s the answer???
question 11)
a.ii) why kinetic energy=
potential energy ???
iv)m1u1=(m1+m2)v
[why (m1+m2)=5]
Can i know why???
question 11
comment: we assume all the kinetic energy changed into potential energy(no loss of energy) so its equal
m1+m2=5....hmmm its given in the question that mass of the block and the bullet is 5kg
which school ru from?
ok for the question 5 ill check and let u know tomorrow wokay
hello...i'm from smk usj 8...
thank you very much for the answer...
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