A6
A vehicle uses a radar system to detect objects in the front by emitting electromagnetic wave. When you are driving, at one point and one instant the magnetic field is pointing to the right. The electric field at that point and instant points to
up
Describe the electric and magnetic fields that make up an electromagnetic wave in terms of their orientation relative to each other and their phases.
They are perpendicular to and in phase with each other.
Assume a laser has a power outputs of 2 mW.If the laser beam is projected onto a circular spot 1.5 mm in diameter, what is its intensity in W/m2? Enter an interger.
1132 W/m^2
What is the frequency (in THz) of the 192-nm ultraviolet radiation used in laser eye surgery? Enter an integer.
1,563 THz
Approximately how long does it take light from your outstretched hand to reach your eyes?
1.5 nanoseconds
An electromagnetic wave in vacuum has an electric field amplitude of Emax = 189.7 V/m. Calculate the amplitude Bmax of the corresponding magnetic field in units of nanoTesla. Enter an interger.
632 nT
Describe electromagnetic force as explained by Maxwell's equations.
According to Maxwell's equations, electric force and magnetic force are different manifestations of electromagnetic force.
In SI units, the electric field in an electromagnetic wave is described by Ez = 100 sin(107y - ωt ). What is the direction of the magnetic field of the EM wave?
x-direction? Undefined?
