Sustained interference patterns

In summary, to produce a sustained interference pattern from multiple light sources, the sources must be coherent, meaning they have the same wavelength, amplitude, and phase or constant phase difference. Monochromatic sources may also produce this pattern, but it is not a sufficient condition.
  • #1
wakejosh
102
0

Homework Statement


In order to produce a sustained interference pattern by light waves from multiple sources, which of the following conditions is sufficient?

a. the sources are coherent
b. the sources are monochromatic
c. no more than two sources are allowed
d. three or more sources are required
e. none of the choices above are valid



The Attempt at a Solution



This question seems messed up to me. From what I understand, both A and B can be correct. I am totally confused. please help if you can, thanks.
 
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  • #2
any help? my brain is melting.
 
  • #3
The sources should be coherent.

The coherent sources, by definition, should possesses same wave length, same amplitude and same phase or constant phase difference.

But a monochromatic source will possesses same wave length but not necessarily be of same phase or constant phase difference.
 

1. What are sustained interference patterns?

Sustained interference patterns are patterns that occur when two or more waves overlap and interfere with each other, resulting in areas of constructive and destructive interference. These patterns can persist over time due to the constant interference of the waves.

2. What causes sustained interference patterns?

Sustained interference patterns are caused by the superposition of two or more waves that have the same frequency and amplitude. When the waves overlap, they create areas of constructive and destructive interference, resulting in the sustained pattern.

3. How are sustained interference patterns different from other types of interference?

Sustained interference patterns are different from other types of interference because they persist over time. Other types of interference, such as momentary interference, may only occur for a brief moment before the waves move out of sync.

4. What factors can affect sustained interference patterns?

The factors that can affect sustained interference patterns include the frequency and amplitude of the waves, the distance between the sources of the waves, and the medium through which the waves are traveling. Any changes in these factors can alter the interference pattern.

5. What are the practical applications of sustained interference patterns?

Sustained interference patterns have a variety of practical applications in fields such as physics, engineering, and medicine. They can be used to study wave behavior, design and test electronic devices, and create images in medical imaging techniques such as ultrasound and MRI.

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