Difference Between Diffraction and Interference

The difference between Diffraction and Interference is simply the fact that the waves involved in this process are of different types. Waves that originate from two different, coherent sources produce the property termed as Interference, whereas secondary wavelets that originate from the same wave but occur from different parts of it, produce a phenomenon termed as Diffraction. These both sound alike however they are entirely different by nature. Understanding the resolving power of telescope and microscope can be useful.

Difference between Diffraction and Interference

It is important to know the key differences between them by examining the region of minimum intensity, this region is incredibly dark in interference and it is less dark in the case of diffraction. Like these few differences, there are a few more factors that differentiate diffraction over interference. It is important to know the distinctions between one and the other. Some of the major key differences between diffraction and interference are listed below:

Difference between Diffraction and Interference

Interference

Diffraction

Interference may be defined as waves emerging from two different sources, producing different wave fronts.

Diffraction on the other hand can be termed as secondary waves that emerge from the different parts of the same wave.

In interference the intensity of all the positions on maxima are of similar intensity in interference.

In diffraction, there is a variance of the intensity of positions.

The width of the fringes in interference is equal in interference.

The width of the fringes is not equal in interference.

It is absolutely dark in the region of minimum intensity, in the case of interference.

In the case of diffraction, there is a variance in the intensity of interference.

If the number of sources are few such as two sources, then they are referred to as interference sources.

If the number of sources are many, that is more than two then it is referred to as diffraction sources.

Thus this is the key difference between Interference and Diffraction. For more information download the BYJU’s app today! You may also want to check out out our Related links:


Practise This Question

A large elevator is sliding on a wedge of angle θ. What will be the range of a projectile in this frame, if it is projected at an angle α