The sun emits electromagnetic waves with a power of 4.0
The sun emits electromagnetic radiation with a power of 4.0 x 1026 W. The earth’s average distance from the sun is 1.50 x 1011 m. The earth’s radius is 6.37 x 106 m. What total radiant energy does the earth receive from the sun over the course of a single day? (Answer: 1.6 x 1022 J)
Chapter 24 Electromagnetic Waves 6. A neodymium-glass laser emits short pulses of high-intensity of electromagnetic waves. The electric field of such a laser pulse has an rms value of Ems = 8.0 x 10' N/C. (a) Determine the average power of each pulse that passes through the cross-sectional area of of the laser beam A -5.05 x 10-5 m. (b) Determine the average intensity of this laser in W/m². - 4-
A neodymium-glass laser emits short pulses of high-intensity electromagnetic waves. The electric field of such a wave has an rms value of Erms = 2.0 × 109 N/C. Find the average power of each pulse that passes through a 1.6 × 10-5-m2 surface that is perpendicular to the laser beam. A neodymium-glass laser emits short pulses of high-intensity electromagnetic waves. The electric field of such a wave has an rms value of E 2.0 x 109 NIC. Find the average...
Assume a 55 kW radio station emits Electromagnetic waves uniformly in all directions. How much energy per second crosses a 4.0 m^2 area 50 m from the transmitting antenna? __7____ W What is the rms magnitude of the E field at this point, assuming the station is operating at full power? _______ What is the voltage induced in a 1.0 m long vertical car antenna at this distance?
A neodymium-glass laser emits short pulses of high-intensity electromagnetic waves. The electric field of such a wave has an rms value of Erms = 2.50 109 N/C. Find the average power of each pulse that passes through a 2.40 10-5 m2 surface that is perpendicular to the beam.
A light bulb emits spherical electromagnetic waves uniformly in all directions. Find (a) the intensity, (b) the radiation pressure, and (c) the electric and magnetic field magnitudes at a distance of 3.0 m from the light bulb, assuming that 50 W of electromagnetic radiation is emitted
In a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of fre- quency 110.0 MHz in opposite directions inside a narrow cavity with reflectors at both ends, causing a standing-wave pattern to occur. (a) How far apart are the nodal planes of the magnetic field? (b) If the standing-wave pattern is determined to be in its eighth harmonic, how long is the cavity?
In a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of frequency 115.0 MHz in opposite directions inside a narrow cavity with reflectors at both ends, causing a standing wave pattern to occur. Part A How far apart are the nodal planes of the magnetic field? Express your answer in meters. Part B If the standing wave pattern is determined to be in its eighth harmonic, how long is the cavity?
A point source emits sound waves with a power output of 100 watts. What is the sound level (in dB) at a distance of 10 m? 16-5
The Earth absorbs energy emitted from the sun. If the sun emits energy at a rate such that the emitted power is 3.9x1026W how much power is incident on the earth? (Hint, you may need to look up the Earth-Sun distance and radius of the Earth.)