Doppler shift of the frequency of the ultrasonic waves on reflection from the red blood cells is 25 Hz. The frequency of the generator is 400 kHz. Determine the speed of a blood in the vessel if the angle of the radiation beam is equal to 60o, the speed of sound in the blood - 1570 m/s.

Q: (1) Show that the ratio of reflected power to incident power iS 12 n | R = 1+n and the ratio of…

A: when a ray strike or travel from one medium to another it partially reflected and partially…

Q: When astronomers observe a supernova explosion in a distant galaxy, they sec a sudden, simultaneous…

A: The light’s speed is dependent on the medium in which it propagates but does not depend on the…

Q: About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average…

A: Power output of light = 0.05*100 = 5 Watt

Q: The light at the Earth from a certain star has an intensity of about 76×10-8W/m2. If the star emits…

A:

Q: Microwaves used in microwave ovens often have a wave- length of about 12 cm. What is the frequency…

A: The relation between wavelength λ and frequency ν for electromagnetic waves is given by, ν=cλ Where…

Q: The Intensity of solar radiation at the Earth's orbit is 1370 W/m2. However, because the atmosphere,…

A:

Q: Red Visible light has a wavelength of 6.5x10^-7m what is the frequency in s^-1

A: Required : Frequency of light

Q: Sunlight just outside Earth’s atmosphere has an intensity of 1.40 kW/m2. Calculate (a) Em and (b) Bm…

A:

Q: 21 - The Sun delivers an average power of 14.24 W/m2 to the top of Saturn's atmosphere. Find the…

A: The expression for the average intensity is,

Q: *59. ssm mmh A dish of lasagna is heing heated in a microwave oven. The ef- fective area of the…

A:

Q: 3R QR A 100 watt bulb emits light in all directions. The distance R from the bulb is equal to 1.0…

A:

Q: A bat's sqeak takes 0.146 s to retun after reflecting off a moth.  How far away is the bat from the…

A: The time to reach the moth is,

Q: When an electromagnetic wave travels fromone medium to another with a different speed of…

A: (a) If the wave speed decrease, the wavelength of the wave decreases.

Q: After filtering through the atmosphere,the Sun’s radiation illuminates Earth’s surface with an…

A: The expression for find average force is F=PA=IcA

Q: The wavelength an electromagnetic wave is 215nm in water with n=1.33, find its frequency.

A: Calculate the velocity of the electromagnetic wave in water.

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: Electromagnetic radiation having a 15.0 − µm wavelength is classified as infrared radiation. What is…

A:

Q: A standing wave pattern is set up by radio waves between two mwtal sheets 2.00 m apart, which is the…

A:

Q: The power output of a certain public-address speaker is 6.40 W. Suppose it broadcasts equally in all…

A: Given data The power output by the speaker is given as P = 6.40 W. a) The pain threshold of sound…

Q: Provide an insight on the reflection phenomena in transmission lines and the formation of Standing…

A:

Q: The power output of a certain public-address speaker is 6.65 W. Suppose it broadcasts equally in all…

A: Power of speaker (P) = 6.65 WIntensity of sound which is painful to ears = 1 Wm2

Q: a solar panel is a square 0.5m on a side and absorbs all the light that hits it. It the panel has a…

A: Force required = weight of solar panel Force required(F) = mg  Here, F = required force  m = mass of…

Q: Satellite radio technology in the USA uses radio waves of wavelength 0.13 m. What is the frequency…

A: frequency of radio wave  = ? wavelength , λ = 0.13 m (given ) we know that  v = fλ

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: The Sun delivers an average power of 1 370. W/m2 to the topof Earth’s atmosphere. Find the…

A:

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

A:

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: ULF (ultra low frequency) electromagnetic waves, produced inthe depths of outer space, have been…

A: The period of the wave is given by T=λc

Q: A bat flying in a cave emits a sound and receives its echo 0.14 ss later. Find the distance to the…

A: Given data Time of the echo to receive is, t=0.14 s   The time taken by the sound to reach the wall…

Q: In black-and-white photography if one uses a red light of wavelength 648.0 nm in darkroom, its…

A: Given data: Wavelength of red light (λ) = 648.0 nm Required: Frequency in Terahertz

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

A:

Q: A solar car has a roof dimensions of 150cm x 80cm for solar cells. Calculate the electrical power…

A:

Q: Explain the term, ‘amplitude modulation’ of a signal. For an amplitude modulated wave, the maximum…

A: The modulation of signals is necessary to modify the carrier signal to the required conditions so…

Q: Miles Tugo is camping in Glacier National Park. In the midst of a glacier canyon, he makes a loud…

A: Given:  t = 1.22 s  v = 343 m/s

Q: A bat’s squeak takes 0.146 s to return after reflecting off a moth. How far away is the bat from the…

A: Let the distance of the bat from the moth to be d. The expression for the speed is written as, So,…

Q: What is the intensity of a 100 -W light bulb at a distance 10 cm from the bulb's center? (in units…

A:

Q: While hunting for moths to eat, a bat emits a chirp that lasts for 2.50 ms and then is silent while…

A: Given total time =2.50ms and moth speed =4.4m/s  and temperature =10°C and speed of sound in air at…

Q: What is the Doppler-shifted wavelength of a red (660 nm) traffic light approached at 65 m.p.h.? At…

A:

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…

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.