9(a)]
The relation w = ck is the standard one for waves (see for example,
Section 15 4 of class XI Physics textbook) This relation is often written
in terms of frequency, n (=w/2p) and wavelength, l (=2p/k) as
2
2
πν
λ
=


c
π
   or
nl = c
[8 9(b)]
It is also seen from Maxwell’s equations that the magnitude of the
electric and the magnetic fields in an electromagnetic wave are related as
B0 = (E0/c)
(8