What is the shielding effectiveness of a 0.022-in thick, soft aluminum shield located 1 ft awaythe source of a 10 KHz Electric Field?

75cm The intensity of sunlight sdeiking the earth is 1.4kW/m². what is the maximum power that could possibly be abrorbed by the earcth? (The earth's radius is 4000 miles) How does this Compare with the average power dlemands af humankind! Given the earth-sun distarice of 93 million miles, of I50 million miles, and the mars -Sun distance what is the intenrity of sunlight shriking mars? The 6 pluto-sun dirtance is about 4. billion miles; what is intinidy on pluta?

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 1.30 mm in diameter, what is its intensity? 1.88e2 W/m2 (b) Find the peak electric field strength. 1.255e-6 What is the relationship between intensity and electric field strength? V/m (c) Find the peak magnetic field strength. 3.765e-6 What is the relationship between electric field strength and magnetic field strength in an electromagnetic wave? T

The rate at which information can be transmitted on an electromagnetic wave is proportional to the frequency of the wave. Is this consistent with the fact that laser telephone transmission at visible frequencies carries far more conversations per optical fiber than conventional electronic transmission in a wire? What is the implication for ELF radio communication with submarines?