Police radar guns work by measuring the change in frequency of a reflected pulse of electromagnetic waves. A gun reads correctly only if a car is moving directly toward or away from the person making the measurement. Explain why this is so.

Q: The Earth has a radius of 6.38 x 106 m and is 1.50 x 1011 m from the Sun. The intensity of sunlight…

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Q: (e)  The magnetic field reaches its maximum value, Bmax = 6.8 x 10-6 T, in the z direction at some…

A: Given: time period of electromagnetic wave, T = 3.5 × 10-8 s Maximum value of magnetic field, Bmax =…

Q: Using Maxwell’s equation, derive wave equation for the electric field of a linearly polarized wave…

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Q: A meteorologist for a TV station is using radar to determine the distance to a cloud. He notes that…

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Q: Light travels from the Sun to Earth. Which of the following characteristics of electromagnetic waves…

A: Given data, Light is travelling from Sun to Earth.

Q: Asg There are many kinds of waves that fall in the category of Electromagnetic Radiation. The most…

A: distance of starting gun from the runners (d) = 100 m

Q: FM radio station WSRV in Atlanta Broadcasts at 97.1MHz. What is the wavelength of these…

A: The equation for the wavelength of the electromagnetic waves

Q: CHECКРО Choose the letter that corresponds to the correct answer. 1. Which of the following is not…

A: Answer 1) Electromagnetic wave is a transverse wave So option a is true Electromagnetic wave are…

Q: Electromagnetic radiation which is larger (larger wavelength) will easily travel through a solid…

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Q: Near the earth the intensity of radiation from the sun is 1.35 kW/m2. What volume of space in this…

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Q: The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is Bo=510 nT.…

A: Given data :                  Amplitude of magnetic field,    B0 = 510 nT = 510×10-9 T Formula :…

Q: The Doppler weather radar used by the National Weather Service is referred to as Nexrad, which…

A: when the Nexrad is a source and the weather which is approaching the source is the observer, then…

Q: A light bulb radiates 120 nW of single-frequency sinusoidal electromagnetic waves uniformly in all…

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Q: If the fundamental source of a sound wave is a vibratingobject, what is the fundamental source of an…

A: The fundamental source of the electromagnetic wave is moving charge

Q: Waves produced on a rope tied at one end  are described as both electromagnetic and transverse..True…

A: Electromagnetic waves are characterized as it has a speed equal to the light and they have both…

Q: The distant galaxy called Cygnus A is one of the strongestsources of radio waves reaching Earth. The…

A: The time it takes for a wave to travel from the galaxy to Earth is,          Time taken…

Q: microwave oven can heat 330 g of water from 25.0°C to 100.0°C in 2.60 min. The specific heat of…

A: Given  Mass of water m=0.330kg Rise in temperature ∆T=100-25=750 C Time t=2.60 min=2.60×60=156…

Q: No 1 is : Give sunusoidal solution of electromagnetic wave equation by giving w=kc for the given…

A: Here. the wave equation is described as mentioned below.

Q: The radiation power density of the sun is approximately 150 W/m² in some locations on the Earth…

A: Write the given values with the suitable variables. I=150 W/m2A=0.6 m×1.6 m=0.96 m2θ=45° Here, I, A,…

Q: ch statement is not true about light? It is an electromagnetic wave. It travels in vacuum at 3 x…

A: light It is an electromagnetic wave

Q: Similar to perceived loudness in hearing, the brightness the human eye and brain perceive for light…

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Q: lp ake Home Pr...x 81.2% Problem # 2 (30 points). The figure below shows a plane electromagnetic…

A: (a)Using kirchoff's Voltage law in loop CDEFC, we get the equation as

Q: Microwaves used in microwave ovens often have a wavelength of about 26 cm.  What is the frequency of…

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Q: The Sun emits electromagnetic waves equally in all directions. The intensity at Earth’s upper…

A: Intensity of EM waves at earth's upper atmosphere (I) = 1.4 kWm2= 1400 Wm2distance between earth and…

Q: An electromagnetic wave is travelling from vacuum to a salt solution with relative permeability…

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Q: ough vacuum at a frequency of 60MHz. However, it is also broadcast through air with propagation…

A: We know that the relation between the velocity and the wavelength of the wave signal is given as  λ=…

Q: The power output of a certain public-address speaker is 6.20 W. Suppose it broadcasts equally in all…

A: Given data: The power output of the public-address speaker is, Parg= 6.20 W The threshold Intensity…

Q: On its highest power setting, a certain microwave oven projects 1.00 kW of microwaves onto a 30.0 by…

A: a. the intensity can be calculated as follows.

Q: 17. A 150 W light bulb emits radiation waves spreading out equally in all directions. What is the…

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Q: Electromagnetic waves in vacuum are waves in which the electric and magnetic fields oscillate in a…

A: Since the electric field and magnetic fields are oscillate in a direction perpendicular to the…

Q: Depending on the situation, a cell phone will project between 0.02 W and 2 W of radiowave radiation.…

A: Given, Radio waves producing at a rate of 0.36 Watts

Q: The intensity of sunlight that reaches Earth’s atmosphere is 1348 W/m2. What is the intensity of the…

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Q: A certain electromagnetic wave has an average intensity of 6 x 104 W/m2. What is the average energy…

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Q: Doppler shift of the frequency of the ultrasonic waves on reflection from the red blood cells is 25…

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Q: An electromagnetic wave consists of a(n)_ and a(n), vibrating perpendicular to each other.

A: An electromagnetic wave itself tells us about its nature. according to Maxwell's electromagnetic…

Q: maximum value of the electric field in a light wave is 800 N/C. Calculate the rms value of the…

A: E =cB

Q: - Which of the following statements is not correct about the electromagnetic wave? A. Can't travel…

A: Electromagnetic waves are waves that travel through space carrying electromagnetic energy. These…

Q: Some devices use electromagnetic waves to find the location and speed of an object. In these…

A: As you have mentioned there is a device called as SONAR. Sonar  is a technique that uses sound…

Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.