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- Radio waves transmitted through space travel at 3.00 x 10$ m/s. If their wavelength is 0.240 m, what is their frequency?eProcesses at the center of a nearby galaxy cause the emission of electromagnetic radiation at a frequency of 2.53×1013 Hz.2.53×1013 Hz. Detectors on Earth measure the frequency of this radiation as 1.63×1013 Hz.1.63×1013 Hz. How fast is the galaxy receding from Earth2. Two astronauts are 1.20 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. The time it takes for sound waves to travel at 346 m/s through the air between the astronauts equals the time it takes for the electromagnetic waves to travel to the earth. How far away from the earth is the spaceship? m.
- An electromagnetic wave with a frequency 7.50x1014 Hz propagates with a speed of 2.00x108 m/s in a certain piece of glass. What is The wavelength of the wave in glass? (nm)A spacecraft approaching a star at 4.00 E 7 m/s fires a laser at a stationary target. The beam of light has an apparent frequency of 5.04 E 16 hz. What is the wavelength of the light beam that hits the target? a 1.26 E 9 m b 5.95 E −9 m c 7.94 E −10 m d 8.24 E −9 mAt a certain geographic location, light intensity from the Sun is 900 J/(m² .s). This means that sunlight delivers 900 joules of energy to each square meter of ground in each second. Suppose solar panels are installed on the roof of a house to generate electricity from sunlight. The total area of the solar panels is 25 m². Calculate the maximum electric energy that can be generated per second: Unfortunately, solar panels are not 100% efficient at converting electromagnetic energy to electricity. Suppose the solar panels have an efficiency of 15%. This means that only 15% of the electromagnetic energy incident on the solar panels is converted to electricity, while the rest is reflected or converted to thermal energy. Given this efficiency, calculate the electric energy that can be generated per second:
- Starting from Maxwell's equations V × V × A = V(V· A) – V²A | in a vacuum, use the identity and show that the electric and magnetic fields satisfy both the equation of a wave and obtain the speed of that wave in the MKS system.A certain electromagnetic wave has an average intensity of 6 x 104 W/m2. What is the average energy density of the wave? High O3x10-8 J/m³ 2x 10-4J/m³ O6x 104 J/m³QUESTION 5 The distance between Planet X and a star is 1.2 x 1011 m. At the surface of Planet X, the average intensity of the radiation from the star is 5355 W/m2. If the star radiates isotropically, which of the following is the average power of the star? 5.47 x 1027 w