Q2 Q3 What would the new path difference , ? d, be for the point P of the observ

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Q2

Q3

What would the new path difference, ?d, be for the point P of the observer if it was located at (x,y)=(3.0m, 1.0m)? Hint: DRAW a new figure to help visualize the geometry. Look at the Figure below.

Q4

Looking at the PhET simulation "Sound/Two Source Interference", what do the white, black, and grey areas represent? Compare this to the figure below (and match up the respective colors). Also look carefully at which part of the figure corresponds to maximum and minimum intensity. (Be CARFEUL with how you define intensity! The man listens with his left ear only!)

Q5

Q6

Please look at this example and its solution:

Solution: Option (d).

The path difference must be increased by one wavelength for the next maximum. Since the change in path length is double the distance that the mirror moves, the mirror needs to move by only 316nm.

How far should speaker 2 be away from speaker 1 in order to completely cancel out the sound at the microphone (i.e., cause destructive interference)? Wave fronts represent the crests of the waves. What is the phase difference between two adjacent wave fronts? White shows areas of maximum intensity. Black shows areas of minimum intensity. Grey shows areas of no intensity. White shows BOTH the crests and troughs. Black shows where the crests and troughs cancel to zero. Grey shows areas of equal amounts of white and black. White shows the crests. Black shows the troughs. Grey shows where the crests and troughs cancel to zero. White shows areas of minimum intensity. Black shows areas of no intensity. Grey shows areas of maximum intensity. White shows areas of minimum intensity. Black shows areas of no intensity. Grey shows areas of maximum intensity. A Michelson interferometer is operating in a vacuum chamber using light from a laser with a wavelength of 632 nm. The movable mirror is adjusted to give a maximum bright output at the detector. How far must the movable mirror be moved to produce the next output maximum? Looking at Checkpoint C-28-2 in the textbook (pg 766), how many times will the centre of the output go dark if you move one of the mirrors by 1.0mm? Choose the closest answer.

Explanation / Answer

1) option 3 is correct becoz two wave difference is multiple of L(lemda )/2

2) pi option b

3)option d

4)option d

5)c

6)a

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