1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alekssandra [29.7K]
2 years ago
7

Why is the contribution of the wavelets lying on the back of secondary wave front zero?​

Physics
2 answers:
Tresset [83]2 years ago
3 0

Answer:

The contribution of the wavelets lying on the back of the wave front is zero because of something known as the Obliquity Factor. It is assumed that the amplitude of the secondary wavelets is not independent of the direction of propagation, Sources: byju's.com

Anna [14]2 years ago
3 0

According to the Voigt and Kirchhoff's law for wavelets, the contribution of a wavelet in any direction making an angle x with the normal to the wavelet is proportional to {1+cos(x)/2)}

For wavelet lying on the back of secondary wavefront,

  • x = 180°

→ So, the proportional factor:

→ {1+cos(180°)/2}

→ (1-1/2)

→ (0/2)

→ 0

That's why the contribution of the wavelets lying on the back of secondary wave front is zero

You might be interested in
Prove that the weight of an object on moon is 1/6th of that on earth​
Elena L [17]

Answer:

The mass of moon is 1/100 times and its radius 1/4 times that of earth. As a result, the gravitational attraction on the moon is about one sixth when compared to earth. Hence, the weight of an object on the moon is 1/6th its weight on the earth.

4 0
3 years ago
In nuclear reaction 5 kg of reactants give 2kg of products
dlinn [17]
Choice A is correct.======Kinetic energy equation:   KE = (1/2)(m)(v²)This tells us that KE is directly proportional to mass and the square of velocity. In other words, the more mass and more velocity an object has, the more kinetic energy.If an object is sitting at the top of a ramp, there is no velocity and therefore no kinetic energy.    Choices B and D are wrong.A golf ball has more mass than a ping-pong ball, so a ping-pong ball would have less kinetic energy than a golf ball rolling off the end of a ramp.    Choice C is wrong.Choice A is correct.


6 0
3 years ago
Identify the action-reaction force pair involved when you catch a ball
vladimir1956 [14]
When you catch the ball you act surprised, action- reaction
7 0
3 years ago
Read 2 more answers
What is the function of the commutator in a motor?
vlabodo [156]
The answer you are looking for is: 
D.) It facilitates the moment of the current though a wire. 
Hope that helps!! 
Have a wonderful day!!<span />
7 0
3 years ago
Read 2 more answers
A car traveling at 5m/s starts to speed up after 3 seconds its velocity has increased to 11 m/s what is its acceleration
vfiekz [6]

Answer:

a=(v-u)/t

Explanation:

a =(11-5)/3

a= 8/3

a= 2.6 m/s

4 0
2 years ago
Other questions:
  • An elevator moves from rest<br> to 2 m/s over 8 seconds. What<br> is the elevator's acceleration?
    14·1 answer
  • Which of the following statements describe the transfer of energy?
    10·1 answer
  • (1) A net force of 265 N accelerates a bike and rider at 2.30 m/s. What is the mass of the
    7·1 answer
  • A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.91 s afte
    15·1 answer
  • A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an angle θ above the horizontal.
    10·1 answer
  • How much kinetic energy does an 80 kg man have while running at 3 m/s?
    13·1 answer
  • Help PLEASE
    5·1 answer
  • A baseball bat is a lever. Which of the following explains how a baseball bat differs from a lever like a pry bar?
    5·1 answer
  • What is electromagnetic induction?​
    8·2 answers
  • IN nuclear in oder to slow down fast neutron the target material should contain
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!