Practical Applications of E.M. Waves

Which of the following is the speed of light?

• A. 3X10^8 m/s

• B. 3X10^18 m/s

• C. 3X10^10 m/s

• D. 3X10^81 m/s

Who discovered electromagnetic induction, but was not recognized because Michael Faraday had already published his results?

• A. Joseph Henry

• B. James Clerk Maxwell

• C. Albert Einstein

• D. Wilhelm Eduard Weber

Who discovered that Earth was magnetic and theorized that electricity and magnetism were not the same?

• A. William Gilbert

• B. Karl Friedrich Gauss

• C. Andre Marie Ampere

• D. Hans Oersted

Which of the following modes of propagation of electromagnetic waves can be used for one-way communication from the military to submerged submarines as they penetrate to a significant depth into seawater?

• A. Sky wave propagation

• B. Space wave propagation

• C. Ground wave propagation

• D. Ionosphere Wave propagation

Which of the following is INCORRECT?

• A. The radio waves having high frequencies are called space waves.

• B. Electromagnetic waves have both an electric and a magnetic component.

• C. Space wave propagation is also known as Tropospheric Wave propagation.

• D. The electromagnetic waves are a longitudinal wave that propagate outward from a source perpendicular to the direction of the wave’s travel.