In a diffraction pattern, the central maximum is observed to be the brightest. W

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Question: In a diffraction pattern, the central maximum is observed to be the brightest. What is the reason for this? (2022)

Options:

Correct Answer: It has the maximum intensity

Exam Year: 2022

Solution:

The central maximum has the maximum intensity because all light waves arrive in phase at this point, leading to constructive interference.

In a diffraction pattern, the central maximum is observed to be the brightest. What is the reason for this? (2022)

In a diffraction pattern, the central maximum is observed to be the brightest. What is the reason for this? (2022)

Step 1: Understand what a diffraction pattern is. It is a pattern created when light waves spread out after passing through a small opening or around an obstacle.
Step 2: Identify the central maximum. This is the brightest spot in the diffraction pattern, located in the center.
Step 3: Know that light waves can interfere with each other. This means they can combine in ways that make them stronger (constructive interference) or weaker (destructive interference).
Step 4: Realize that at the central maximum, all the light waves that reach this point are in phase. This means they are aligned perfectly with each other.
Step 5: Since the light waves are in phase at the central maximum, they combine to create a stronger light intensity, making it the brightest spot in the pattern.

Interference – The phenomenon where two or more waves superpose to form a resultant wave, leading to regions of constructive and destructive interference.
Diffraction – The bending of waves around obstacles and the spreading of waves when they pass through narrow openings.
Phase of Waves – The position of a point in time on a waveform cycle, which determines whether waves will interfere constructively or destructively.