Electromagnetic Wave Propagation

Given that the energy of the pulse

E%20%3D%20P%20%5Ctimes%20t

, where

P

is the power of the pulse and

t

is the duration:

E%20%3D%2060%20%5C%2C%20%5Ctext%7BmW%7D%20%5Ctimes%2050%20%5C%2C%20%5Ctext%7Bns%7D%20%3D%2060%20%5Ctimes%2010%5E%7B-3%7D%20%5C%2C%20%5Ctext%7BW%7D%20%5Ctimes%2050%20%5Ctimes%2010%5E%7B-9%7D%20%5C%2C%20%5Ctext%7Bs%7D%20%3D%203%20%5Ctimes%2010%5E%7B-15%7D%20%5C%2C%20%5Ctext%7BJ%7D

Now, the momentum

p

of the object is given by the equation

p%20%3D%20%5Cfrac%7BE%7D%7Bc%7D

, where

c%20%3D%203%20%5Ctimes%2010%5E8%20%5C%2C%20%5Ctext%7Bm%2Fs%7D

is the speed of light:

p%20%3D%20%5Cfrac%7B3%20%5Ctimes%2010%5E%7B-15%7D%20%5C%2C%20%5Ctext%7BJ%7D%7D%7B3%20%5Ctimes%2010%5E8%20%5C%2C%20%5Ctext%7Bm%2Fs%7D%7D%20%3D%201.0%20%5Ctimes%2010%5E%7B-16%7D%20%5C%2C%20%5Ctext%7Bkg%20m%2Fs%7D

Thus, the final momentum of the object is

1.0%20%5Ctimes%2010%5E%7B-16%7D%20%5C%2C%20%5Ctext%7Bkg%20m%2Fs%7D

Chapter Questions
1 MCQs