In an electromagnetic wave, the electric and magnetising fields are 100V m−1 and 0.265 Am−1. The maximum energy flow is
Here E0=100 V/m, B0=0.265 A/m. ∴ Maximum rate of energy flow S=E0× B0 =100× .265=26.5Wm2
The adiabatic elasticity of hydrogen gas γ=1.4 at NTP is