Question

calculate the time required for 60 percentage of a sample of random undergo decay given that the t half of an antenna is equal to 3.8 days​

Answer 1

Answer:

You have to firstly calculate the free space wave length lambda0,

Lambda0= c/f, with c the speed of light in free space= 3x10^10 cm/sec,

with f= 2.45 Ghz, then lambd0= 3x10^10/2,5 x10^9= 12 cm,

so the given dimensions in units of wavelength are to divide the lengths in centimeters by the wavelength lambda0,

60/120, 60/120, 1,6/120 = 0.5 lambda0, 0.5 lambda0.,0.013 lambda0,

If the material has a dielectric constant epsolon r, then the lambdamedium= lambd0/ sqroot of epsilonr,

So the the above numbers will be multiplied by the aqroot of epsilonr to be, 0.5 epsilon r lambdam, 0.5 eosilonr lambdam.,0.013 epsilonr lambdam