edexcel as physics Watch

me2*
  • Political Ambassador
Badges: 10
Rep:
?
#1
Report Thread starter 4 years ago
#1
can someone plz help :


i dont understand some certain things about waves such as phase difference path difference .

:confused:
0
reply
physicst
Badges: 16
Rep:
?
#2
Report 4 years ago
#2
Please see the following link

http://physics.stackexchange.com/que...ath-difference

enjoy
0
reply
L'Evil Fish
Badges: 18
Rep:
?
#3
Report 4 years ago
#3
Phase difference is difference in peaks and troughs of two waves.

Path difference is the difference in terms of a wavelength when the waves have reached a certain point.

So if Wave A and B far apart and have a wavelength of 4m.

If point C is 8m away from A but 10m away from B, A will have finished the two cycles, but B will half way through its third cycle.

So phase différence in terms of lambda is lambda/2 = destructive interference

If it's a whole number itll be constructive
0
reply
me2*
  • Political Ambassador
Badges: 10
Rep:
?
#4
Report Thread starter 4 years ago
#4
(Original post by L'Evil Fish)
Phase difference is difference in peaks and troughs of two waves.

Path difference is the difference in terms of a wavelength when the waves have reached a certain point.

So if Wave A and B far apart and have a wavelength of 4m.

If point C is 8m away from A but 10m away from B, A will have finished the two cycles, but B will half way through its third cycle.

So phase différence in terms of lambda is lambda/2 = destructive interference

If it's a whole number itll be constructive



i have a question
0
reply
me2*
  • Political Ambassador
Badges: 10
Rep:
?
#5
Report Thread starter 4 years ago
#5
the question is: Two coherent sources emit waves of wavelength λ in phase. At a point where the two waves meet they have a phase difference of 90° ( 2 radians). Which of the following
could be the path difference at this point?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of the West of England, Bristol
    Undergraduate Open Afternoon - Frenchay Campus Undergraduate
    Wed, 23 Jan '19
  • University of East London
    Postgraduate Open Evening Postgraduate
    Wed, 23 Jan '19
  • University of Gloucestershire
    School of Education Open Day Postgraduate
    Wed, 23 Jan '19

Brexit: Given the chance now, would you vote leave or remain?

Remain (1463)
79.6%
Leave (375)
20.4%

Watched Threads

View All