Two astronauts are 2.50 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 343 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?

Q: Light enables the human eye to see or make things visible. Which of the following statements is/are…

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Q: Three electromagnetic waves travel through a certain point P along an x axis. They are polarized…

A: The horizontal component of E is

Q: Two astronauts are 1.10 m apart in their spaceship. One speaks to the other. The conversation is…

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Q: Light is incident on a heavy glass slab of refractive index 1.6. The speed of light in the glass is…

A: Formula of speed of light in any medium is as follows; v=cη…

Q: An EM wave has a frequency of 2 x 1014 Hz. If the wavelength is halved, then the new frequency is…

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Q: A speeder tries to explain to the police that the yellow warning lights she was approaching on the…

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Q: While driving at a constant speed of 79 km/h, you are passed by a car traveling at 122 km/h. If the…

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Q: 4.) Two astronauts are 4.0m apart in their spaceship. One speaks to the other. The conversation is…

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Q: A police car’s radar gun emits microwaves with a frequency of f1 = 8.70 GHz. The beam reflects from…

A: Given : f1 = 8.70 GHz = 8.70 × 109 Hz v = 44.5 m/s

Q: Your friend waves as she flies by you in her rocket. You measure her speed to be .89 c. She measures…

A: Required : Speed measured by the friend.

Q: A mobile phone network uses microwaves to transmit signals between mobile phones and masts. The…

A: Given that, Distance = 35 km =35000 m Speed = 300000000 m/s

Q: 10. The sun's electromagnetic radiation peaks at the wavelength λ = 555 nm. What is the frequency f…

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Q: All electromagnetic radiation moves at the same speed, which is the speed. In a vacuum, the speed of…

A: Given value--- speed of radiation = 3 × 108 m/s. distance = 149.6 million km. We have to find---…

Q: An electromagnetic wave has an electric field with an rms value of 176.8 N/C. What is the intensity…

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Q: A spacecraft emits a radio signal with a frequency of fs = 3.05 GHz as it speeds away from Earth at…

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Q: Two radio stations, A and B, each broadcast single-frequency of 94.9 MHz (94.9 x 106 Hz) signals in…

A: a) Frequency ,f= 94.9 MHz = 94.9×106 HzSpeed of light, c=3×108 m/sLet λ be the wavelengthSo,…

Q: Remember the wave equation is V = lambda*f For electromagnetic waves traveling in a vacuum, they all…

A: Given, Speed of light, c = 2.998×108 ms wavelength of microwave, λ = 6×10-2 m

Q: Which pair of the maximum electric and magnetic fields is/are possible for an electromagnetic wave…

A: Checking the options; A).

Q: Remember the wave equation is v = lambda - 1 For electromagnetic waves traveling in a vacuumthey all…

A: Given that                    The speed of the light (c) = 2998×105m/s…

Q: f (Hz) x (m) 1/f (s) 2x (m) 523.251 0.34 0.001911 0.68 587.33 0.20 0.001703 0.58 859.255 0 27…

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Q: A wave has a wavelength of 3.20 m. Calculate the frequency of the wave if it is each of the…

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Q: An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is…

A: Given: Wavelength = 500 nm r = 200 m

Q: What are the wavelengths of (a) X-rays of frequency 2.0 × 1017 Hz? (b) Yellow light of frequency 5.1…

A: a. the wavelength of x ray is λ=cf=3×108 m/s2×1017 Hz=1.5×10-9 m

Q: The wavelength of light 589 nm. What is the frequency of this radiation? (c = 3x10 8 m/ s) 5x10 14 s…

A: Given, The wavelength of light=589nm C=3x10^8 m/s we have to find frequency of this radiation

Q: According to Maxwell equations, which one of these statements is wrong: O a. All electromagnetic…

A: solution as

Q: Which of the following is an electromagnetic wave source? A) permanent electrical charges B) there…

A: Electromagnetic wave: A wave produced by the acceleration of an electric charge and propagated by…

Q: You are at a large outdoor concert, seated 300 m from the speaker system. The concert is also being…

A: s1=Distance of the person from the speaker=300 mv1=Speed of sound through air=340 m/ss2=Distance of…

Q: Three electromagnetic waves travel through a certain point P along an x axis. They are polarized…

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Q: By changing the frequency of an EM wave, the _____ of the wave is changing.Required to answer.…

A: Frequency (f) = 1/T Energy (E) = hf

Q: Light has a frequency of 7.21 × 1013 hertz. What is its wavelength? The speed of light is 3.00 × 108…

A: Given data:  Frequency (f) = 7.21×1013 Hz Speed of light (v) = 3.00×108 m/s Required: Wavelength (λ)

Q: What is the frequency of the EM radiation with a wavelength 3000 nm? O5.0 x 1013 Hz O 1.0 x 1014 Hz…

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Q: Which of the following frequencies corresponds to light with the longest wavelength?

A: Wavelength and frequency are inversely proportional to each other. We know,…

Q: Which of the following categories does sound fit in ? (Pick two): A) Electromagnetic B) Longitudinal…

A: Mechanical Waves : These waves can be produced of propagate only in material medium such as water,…

Q: An EM wave has a frequency of 2 x 1014 Hz. What is the wavelength?   A. 1.5 nm   B. 1.5 km   C.…

A: frequency of EM wave= 2 x 1014 Hz EM waves travels with speed of light(c)=3 x 108 m/s let λ be…

Q: The figure shows three situations - A, B, and C - in which an observer and a source of…

A: Actual frequency: f = 4.75×1014 Hz Speed of observer: vo=v=1.80×106 m/s Speed of source:…

Q: Upon refraction, the property of an EM wave that does not change is the     A. both period &…

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Q: The wavelength of visible light is from, O 400 m to 700 m O 400 km to 700 km O 400 cm to 700 cm O…

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Q: An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is…

A: Given values: Incident light's wavelength, power P = 50 W location of detector d = 200 m

Q: The rainbow of visible colors in the electromagnetic spectrum varies continuously from the longest…

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Q: Two astronauts are 1.30 m apart in their spaceship. One speaks to the other. The conversation is…

A: The time it takes for sound waves to travel at 354 m/s through the air between the astronauts is,

Q: 20) The energy of an alpha particle is 8.0 x 10.4J. Assuming that the mass of alpha particle is 6.65…

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Q: The vector direction of the electromagnetic field in a propagating light wave is called __________ .…

A: Given: The vector direction of the electromagnetic field in a propagating light wave is called…

Q: The WCCO AM radio transmitter has a power of 49800 W. You measure the intensity of the signal to be…

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Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.