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What is mail difference between diffraction and interference ?
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What is mail difference between diffraction and interference ?
Interference

1:interference is due to interaction of light coming from two different wave fronts originating from the same source. 
2:Interference fringes are of the same width. 
3: All bright fringes are of the same intensity. 
4:All point of minimum intensity are perfectly dark.
5:The spacing between fringes is uniform.

Diffraction

1:Diffraction is due to interaction of light coming from different parts of the same wave front.
2:Diffraction fringes are not of the same width.
3:All bright fringes are not of the same intensity.
4:All point of minimum intensity are not perfectly dark. 5:The spacing between fringes is not uniform.
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What is mail difference between diffraction and interference ?
Diffraction and interference are two fundamental phenomena of wave propagation. While they both involve the interaction of waves, they have distinct characteristics and occur under different conditions. Let's delve into the details of each phenomenon and explore their differences.

Diffraction:
Diffraction refers to the bending or spreading of waves as they encounter obstacles or pass through narrow openings. It occurs when waves encounter an obstruction or a slit that is comparable in size to their wavelength. Key points about diffraction include:

1. Definition: Diffraction is the phenomenon where waves spread out after passing through an aperture or encountering an obstacle.
2. Wave behavior: When waves undergo diffraction, they bend around the edges of obstacles or openings, resulting in the spreading of the wavefront.
3. Conditions: Diffraction occurs when the size of the obstacle or opening is similar to or smaller than the wavelength of the waves involved.
4. Examples: Diffraction can be observed in various situations, such as the spreading of light waves around the edges of a small aperture or the bending of sound waves around obstacles.
5. Patterns: Diffraction typically results in the formation of patterns, such as bright and dark regions (interference patterns) or a central bright spot surrounded by concentric rings (Fresnel diffraction pattern).

Interference:
Interference refers to the superposition of two or more waves, resulting in the reinforcement or cancellation of the wave amplitudes. It occurs when waves from different sources or wavefronts overlap and interfere constructively or destructively. Key points about interference include:

1. Definition: Interference is the phenomenon where two or more waves combine to form a resultant wave.
2. Wave behavior: Interference occurs when waves overlap and their amplitudes add together or cancel each other out, depending on the phase relationship between the waves.
3. Conditions: Interference requires the presence of two or more coherent sources of waves or wavefronts that have a fixed phase relationship.
4. Examples: Interference is observed in various scenarios, such as the colorful patterns seen in soap bubbles, the bright and dark regions produced by thin film interference, or the interference patterns created by a double-slit experiment.
5. Patterns: Interference leads to the formation of characteristic patterns, including alternating bright and dark regions (constructive and destructive interference), fringes, or interference maxima and minima.

Overall, while both diffraction and interference involve the behavior of waves, they differ in terms of the underlying mechanisms. Diffraction occurs when waves encounter obstacles or narrow openings, resulting in bending and spreading, while interference arises from the superposition of waves with specific phase relationships, leading to constructive or destructive interference patterns.
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Read the following text and answer the following questions on the basis of the same:In one of his experiments on interference, August Jean Fresnel used a biprism to induce interference between two beams. He split a diverging beam of light into two parts by using the biprism to refract them. This resulted in two split beams which acted as if they were from two coherent sources and which therefore interfered with each other.A Fresnel Biprism is a thin double prism placed base to base and have very small refracting angle ( 0.5°). This is equivalent to a single prism with one of its angle nearly 179° and other two of 0.5° each.In Young’s double Slits experiment, a single source is split in two coherent sources. For the Young’s slits experiment, we must approximate that the slits act as point sources. This however is not the case, since the slits have finite width. In this way, it gives rise to unwanted diffraction effects that causes errors.The Fresnel biprism experiment overcomes this problem.A Fresnel biprism is a variation of Young’s Slits experiment. When monochromatic light through a narrow slit falls on biprism that divides it into two components. One of these component is refracted from upper portion of biprism and the other one refracted through lower portion. Two virtual coherent sources formed from the original source. In this case, two virtual coherent sources are point sources and replace slits in Young’s experiment.Q. Which problem of Young’s double slit experiment is overcome by Fresnel biprism?

What is mail difference between diffraction and interference ?
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