One source emits spherical waves and another emits plane waves. For which source does the intensity...
One source emits spherical waves and another emits plane waves. For which source does the intensity measured by a detector of fixed size fall off more rapidly with distance?
Which statements are true?
1.) The intensity of the plane source falls off more rapidly.
2.) The measured intensity for the spherical source decreases as 1/r2.
3.) The measured intensity for the plane source decreases as 1/r.
4.) The measured intensity for the plane source does not decrease.
5.)The measured intensity for the spherical source does not decrease.
6.) The intensity of the spherical source falls off more rapidly.
Homework Answers
statements 2,4,6 are correct.
Spherical waves are waves from a nearby point source. Plane waves are waves from very distant source.
Intensity of plane wave is roughly constant while that of spherical waves decreases as 1/r^2
Add Answer to:
One source emits spherical waves and another emits plane waves.
For which source does the intensity...
An intensity detector can be moved along a straight track. a source of spherical waves is...
An intensity detector can be moved along a straight track. a source of spherical waves is placed at one end of the track. When the detector is 2 m away from the source, it measures an intensity of 80 W/m2. What distance do we need to move the detector from that position to get a measurement 13 dB lower?
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 W (a) Find the intensity 10.7 m from the source. 0.76 Your response differs from the correct answer by more than 100%, w/m? (b) Find the intensity level in decibels at that distance. 118.8 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation Cary out all inter to...
a) A light source emits light with wavelength λ = 434 nm. What color does this...
a) A light source emits light with wavelength λ = 434 nm. What color does this light have? Which frequency has the light? Which energy has a photon with this wavelength? b) This light, which is coherent, hits eidouble slit with gap spacing d = 1.50μm (μ means 10-6, "micro"). Determine the directions (angles) to the max of 0., 1. and 2. order and the first minimum of the interference pattern you get. Create a figure that illustrates these directions....
1. The bending of light as it moves from one medium to another with different indices...
1. The bending of light as it moves from one medium to another
with different indices of refraction is due to change in what
property of light?
A) amplitude, B) phase, C) frequency, D) speed, E) color
2. A ray of light propagates in air (n= 1.33) and strikes a
sheet of crown glass (n=1.523). If angle of refraction in glass is
35.20 , determine the angle of incidence. A) 30.3 0 , B) 32.80 , C)
35.2 0 ,...
Which of the following statements about red giant stars are true? (Select all that apply.) Red...
Which of the following statements about red giant stars are true? (Select all that apply.) Red giant stars are less luminous than main sequence stars of the same temperature. Red giant stars tend to be more luminous than main sequence stars of the same temperatures because they are larger in size. Red giant stars are less luminous than main sequence stars because fusion happens more rapidly in main sequence stars. A red giant star of a given temperature is more...
question 4-7 4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 H...
question 4-7
4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 Hz, and that the wave is subject to the following initial conditions: at x 0 and t = 0: y =-1 cm, and, at x = 0 and t : ar = +20 cm/s (this is the velocity of the point on the rope at horizontal...
question 7 and 8 Purpose To examine the properties of polarized light and the mathematical relationship...
question 7 and 8
Purpose To examine the properties of polarized light and the mathematical relationship describing the intensity of linearly polarized light (Malus'law). In addition, the lab will investigate different ways light can be polarized Overview This lab is the first of three labs exploring the properties of electromagnetic waves. Electromagnetic waves are composed of oscillating electric and magnetic fields. As discussed in the lecture the electric and magnetic field vectors are mutually perpendicular to each other. Light waves...
1) The price of one currency in terms of another is called A)...
1) The price of one currency in terms of another is called A) the exchange rate. B) purchasing power parity. C) the terms of trade. D) a currency band. 2) The three policies which cannot be maintained simultaneously by a nation (sometimes referred to as the "trilemma") do NOT include A) independent control of the money supply. B) independent control of fiscal policy. C) free flow of capital. D) fixed exchange rates 3) The foreign exchange rate refers to A) the rate of change in...
Suppose that an object with a mass of one kilogram and an object with a mass...
Suppose that an object with a mass of one kilogram and an object with a mass of two kilo the Earth's surface. As compared to the one kilogram object, the two kilogram object accelerates grams are both in free fall near O A more because gravity pulls on it more strongly. O B less because it has more inertia. O Cthe same because gravity pulls on it more strongly and it has more inertia. O D more because gravity pulls...
Question 4 to 11 plz Dr? Standing Waves on a String Physics Topics If necessary, review...
Question 4 to 11 plz Dr?
Standing Waves on a String Physics Topics If necessary, review the following topics and relevant textbook sections from Serway / Jewett "Physics for Scientists and Engineers", 9th Ed. • Mathematics of Traveling Waves (Serway 17.2) • Speed of Waves on a String (Serway 17.3) • Superposition of Waves (Serway 18.1) • Standing Waves on a string (Serway 18.2, 18.3) Introduction Imagine two sinusoidal traveling waves with equal amplitudes and frequencies moving in opposite directions....
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 W (a) Find the intensity 10.7 m from the source. 0.76 Your response differs from the correct answer by more than 100%, w/m? (b) Find the intensity level in decibels at that distance. 118.8 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation Cary out all inter to...
1. The bending of light as it moves from one medium to another
with different indices of refraction is due to change in what
property of light?
A) amplitude, B) phase, C) frequency, D) speed, E) color
2. A ray of light propagates in air (n= 1.33) and strikes a
sheet of crown glass (n=1.523). If angle of refraction in glass is
35.20 , determine the angle of incidence. A) 30.3 0 , B) 32.80 , C)
35.2 0 ,...
question 4-7
4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 Hz, and that the wave is subject to the following initial conditions: at x 0 and t = 0: y =-1 cm, and, at x = 0 and t : ar = +20 cm/s (this is the velocity of the point on the rope at horizontal...
question 7 and 8
Purpose To examine the properties of polarized light and the mathematical relationship describing the intensity of linearly polarized light (Malus'law). In addition, the lab will investigate different ways light can be polarized Overview This lab is the first of three labs exploring the properties of electromagnetic waves. Electromagnetic waves are composed of oscillating electric and magnetic fields. As discussed in the lecture the electric and magnetic field vectors are mutually perpendicular to each other. Light waves...
1) The price of one currency in terms of another is called A) the exchange rate. B) purchasing power parity. C) the terms of trade. D) a currency band. 2) The three policies which cannot be maintained simultaneously by a nation (sometimes referred to as the "trilemma") do NOT include A) independent control of the money supply. B) independent control of fiscal policy. C) free flow of capital. D) fixed exchange rates 3) The foreign exchange rate refers to A) the rate of change in...
Suppose that an object with a mass of one kilogram and an object with a mass of two kilo the Earth's surface. As compared to the one kilogram object, the two kilogram object accelerates grams are both in free fall near O A more because gravity pulls on it more strongly. O B less because it has more inertia. O Cthe same because gravity pulls on it more strongly and it has more inertia. O D more because gravity pulls...
Question 4 to 11 plz Dr?
Standing Waves on a String Physics Topics If necessary, review the following topics and relevant textbook sections from Serway / Jewett "Physics for Scientists and Engineers", 9th Ed. • Mathematics of Traveling Waves (Serway 17.2) • Speed of Waves on a String (Serway 17.3) • Superposition of Waves (Serway 18.1) • Standing Waves on a string (Serway 18.2, 18.3) Introduction Imagine two sinusoidal traveling waves with equal amplitudes and frequencies moving in opposite directions....
Most questions answered within 3 hours.
-
Let X be a discrete random variable that follows a
binomial distribution with n = 11...
asked 3 minutes ago -
The equilibrium constant, K, for the following reaction is
1.29×10-2 at 600
K.
COCl2(g) --->
CO(g)...
asked 17 minutes ago -
It is known that 72% of people have a favorable opinion of their
local police force....
asked 19 minutes ago -
A vertical straight wire carrying an upward 26-A current exerts
an attractive force per unit length...
asked 33 minutes ago -
For the purposes of this assignment, you are to choose an
adaptive trait common to more...
asked 41 minutes ago -
Two identical flutes can play middle C (262 Hz) at 20◦C. How
many beats per second...
asked 49 minutes ago -
Potassium phosphate and calcium chloride react in a double
replacement reaction. To produce 1.0 moles of...
asked 44 minutes ago -
Sparky, Co. purchased land as a factory site for $600,000.
Sparky paid $42,000 to tear down...
asked 59 minutes ago -
A Chi-square distribution with 14 degrees of freedom is a
correct model for
Question 8 options:...
asked 1 hour ago -
In a group of 45 mice, there are 10 that have a certain genetic
character. suppose...
asked 1 hour ago -
Topic: Hydrogenic Atoms
The wavefunction of one of the d orbitals is proportional to sin
θ...
asked 1 hour ago -
6. Suppose that the Bank of Canada conducts an open market
purchase of $2000 from a...
asked 1 hour ago