Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.250 mW. If such a laser beam is projected onto a circular spot 2.00 mm in diameter, what is its intensity? answer choices a)318.3 W/m^2 b)224.3 W/m^2 c)159.2 W/m^2 d)79.6 W/m^2

Q: Find the wavelengths of electromagnetic waves with the following frequencies. (Assume the waves are…

A: Frequencies in the given question; f1=4×1019 Hz f2=6×109 Hz Speed of light in vacuum (c)=3×108 m/s

Q: How will the wave patterns on the oscilloscope attached to the speaker change as the volume changes?…

A: The intensity of a sound is the power of the sound in Watts divided by the area the sound covers in…

Q: Or) ^– Write an equation representing a linearly polarized wave with an angular frequency that…

A: Polarised wave means a wave in a plane.

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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Q: A SPeaker is placed in open area Determine how far you must Stand From that SPeaker to receive an…

A:

Q: The intensity of the sound wave from a jet airplane as it is taking off is 100 W/m at a distance of…

A:

Q: dolphin uses echolocation underwater to “see” its surroundings.  If the speed of sound in the ocean…

A: Find the time taken by the dolphin to hear an echo. ∆t=2dv

Q: VP32.4.4 The sun emits light (which we can regard as a sinusoidal wave) equally in all directions.…

A:

Q: The intensity of electromagnetic waves from the sun is 1.4 kW/m2 just above the earth’s atmosphere.…

A:

Q: How will the wave patterns on the oscilloscope attached to the speaker change as the volume changes?…

A: It is given that radio oscillator depands on the number of waves per second while the sound…

Q: A submarine (sub A) travels through water at a speed of 8.00 m/s, emitting a sonar wave at a…

A: Given: Speed of the submarine = Va= 8 m/s Speed of the second submarine = Vb=9 m/s Frequency of…

Q: A laser beam has intensity I0.a. What is the intensity, in terms of I0, if a lens focuses the laser…

A:

Q: The speed of light in air is approximately v = 3.00 × 108 m/s and the speed of light in glass is v =…

A:

Q: A 3,440-Hz pure tone is played on a stereo in an open field. A person stands at a point that is 5 m…

A: Given, A 3,440-Hz pure tone is played on a stereo in an open field person stands at a point that is…

Q: An ultrasonic transmitter and receiver are placed 10.5 ft above the surface of a liquid. How long…

A:

Q: Red light has a frequency of 4.0 x 1014 Hz. a. Find the speed of red light in a vacuum if its…

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: *87. ssm Two submarines are under water and approaching each other head-on. Sub A has a speed of 12…

A: Given: Speed of the submarine A =12 m/s Speed of the submarine B = 8 m/s Frequency of sonar wave by…

Q: The speed of light in air is approximately v = 3.00 × 108 m/s and the speed of light in glass is v =…

A: The given values are listed below. c=3×108 m/sv=2×108 m/sλ=608 nm=608×10-9 m Here, c is the speed of…

Q: When a wave encounters a free boundary, then what is the angle between the incident and reflected…

A: SOlution: reflection of wave from the free boundary

Q: A skyrocket explodes 100 meters above the ground. Three observers are spaced 100 meters apart:…

A:

Q: An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic sound that travels 1530…

A: speed = 1530 m/s time delay T = 6s

Q: En a solar system far far away, the sun's intensity is 100 W/m² for a planet located a distance R…

A: Comment: We'll answer the first question since the exact one wasn't specified. Please submit a new…

Q: The Sun delivers an average power of 14.84 W/m2 to the top of Saturn's atmosphere. Find the…

A:

Q: Light from a laser is propagating in the horizontal direction when it strikes a vertical wall. If…

A: Intensity (I) = 1500 w/m2  Speed of light (c) = 3×108 m/s

Q: Suppose you want to demonstrate the Doppler effect for deep-water waves, using a 7.21 Hz source…

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Q: The power output of a certain public-address speaker is 7.10 W. Suppose it broadcasts equally in all…

A:

Q: A rescue plane is moving to an emergency beacon that has a frequency of 15.2 kHz. The plane is…

A: Given, a rescue plane is moving to an emergency beacon that has a frequency of fs=15.2 kHz. The…

Q: submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of…

A: Time (t) taken by the sonar pulse to return = 1.02 s Speed (v) of sound in salt water = 1531 m s-1…

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: Farmer Fred is outside watching an approaching thunderstorm. He sees a bolt of lightning strike due…

A:

Q: A weather emergency siren is mounted on a tower, 153 m above the ground. On one hand, it would be a…

A: R=153 m   dB=101

Q: The intensity of electromagnetic waves from the sun is 1.4 kW/m2 just above the earth's atmosphere.…

A:

Q: Red light has a frequency of 4.0 x 1014 Hz. a. Find the speed of red light in a vacuum if its…

A: Given data:  Frequency (f) = 4.0×1014 Hz Wavelength in vacuum (λ) = 7.5×10-7 m Wavelength in glass…

Q: A small ship equipped to monitor oceanic weather conditions has a circular radar antenna that…

A: Given data The frequency is given as f = 1.65 x 1010 Hz. The diamter is given as d = 2.10 m. The…

Q: You live along the flight path of planes coming in for a landing at the airport. The intensity of…

A: Given information:Intensity of the plane engine (I1) = 4.0 ×10-7 W/m2Height of the engine when its…

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.