A distortion less line has Zp= 60 Q. o = 20 mNp/m, V= 0.6C, where C is the speed of light in a vacuum. Find the Ui.ne parameters R. L G. C. and / at 100MHz.
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- A bulb emits light ranging in wavelength from 1.04E-7 m to 6.04E-7 m. What is the minimum wave vector of the light (in rad/m)?IX. Suppose we use microwave radar to measure the height of the substance in the tank, and the time from the signal sent to the signal received by the radar is 3.502423×108 seconds. Assume that the height of the tank body is 20m, and the microwave speed is 299792458m/s. Compute the height of the substance. H=? Microwave Radar 20mWhich of the following is a TRUE statement about light? O Red light travels slower than ultraviolet light. O The energy of light increases with its wavelength. Infrared light has a longer wavelength that ultraviolet light. Light of all frequencies has the same energy. O The energy of light decreases as its frequency increases.
- a) ($\mathbf{0.1}$ pts) Show that, given a vector field $\bar{V}$, V× (VV)=V(V · V) + V²Ñ b) ($\mathbf{0.2}$ pts) Starting from Maxwell's equations, demonstrate that the electric field $\bar{E}$ in three dimensions satisfies the vector wave equation V²Ē = 18²Ē c² at²There was a major collision of an asteroid with the Moon in medieval times. It was described by monks at Canterbury Cathedral in England as a red glow on and around the Moon. How long (in s) after the asteroid hit the Moon, which is 3.93 X 105 km away, would the light first arrive on Earth? SAn EM wave has a frequency of 2 x 1014 Hz. What is the wavelength? 1.5 nm O A. O B. 1.5 km oc 1.5 Um O D. 1.5 mm 1.5 cm OE.
- 0000 О A point source emits light isotropically (i.e. with the same intensity in all directions). Let I be the luminous intensity at a distance d from the source. The intensity at a distance 2d is equal to: A. 21 B. I C. 1/4 O D. 1/2 OE. I/162. 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.None
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