When a train passes through the tunnel, the headlight of the engine spreads around and we see darkness all around, do you know why this happens? This happens because of diffraction.
Diffraction is the spreading of light in the dark areas when it passes through a narrow lane or an area and this is accompanied by interference between the waveforms produced. So, do what interference is? Interference is the combination of two or more electromagnetic waveforms that form a resultant wave in which the displacement is either reinforced or cancelled.
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Interference is the phenomenon that takes place when the meeting of the two waves takes as they travel along with the same medium. Besides this, the interference causes the medium to take a particular shape or orientation. Moreover, this shape is due to the whole or the net effect of two individual waves on the medium’s particles.
Diffraction happens due to the spreading out of waves passing through an aperture. In the case of diffraction, the size of the obstacle or aperture is of similar straight dimensions to the incident wave’s wavelength, and its occurrence is significant. Furthermore, it takes place when the travelling wavelength’s part gets obscured or shaded.
Now, let us find the difference between interference and diffraction in tabular form:
So, the above table clearly explains the difference between interference and diffraction in Physics. Now, let us differentiate between interference and diffraction of light:
Question 1: What is the Basic Difference Between Diffraction and Interference in Physics?
Answer: The difference between interference and diffraction of light is important to understand in Physics. The basic difference occurs is that diffraction occurs when waves encounter an obstacle while interference occurs when two waves meet each other.
A light undergoes that passes through the edges of opaque bodies or through narrow openings and in which the rays appear to be deflected is diffraction, while interference can be seen in two sound waves meeting each other and makes it hard to distinguish between the two.
Question 2: Describe the Two Categories of Interference.
Answer: The two categories of interference are as follows:
Constructive interference happens only when the two superposing waves bear the same phase and amplitude. On the other hand, destructive interference takes place when the two superposing waves belong to different phases or have a phase difference but their amplitude of these waves remains the same.
Question 3: Describe a Real-life Example of Diffraction and Interference.
A solar or lunar Corona and the light passing through the hole of a dark room is diffraction.
A thin film of light that we see on the oil drop and soap bubble is because of the interference.