Interference of Light💥All Concepts, derivations & Numericals 🎯Part 2/3 Chap 10 Wave Optics💥Physics
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CBSE Class 12 Physics
NCERT Chapter 10 Wave Optics
Interference of Light
fringe width
Superposition of waves
Constructive interference
destructive interference
interference with white light
Coherent sources
Need of Coherent sources for interference
necessary Conditions for interference
monochromatic light
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The interference of light is a phenomenon that occurs when two or more light waves superpose or overlap with each other. It results in the redistribution of the energy of the waves, leading to various patterns of constructive and destructive interference.
Interference can be observed when light waves from coherent sources, such as lasers or certain types of lamps, interfere with each other. Coherent sources produce waves with a constant phase relationship, meaning the crests and troughs of the waves are aligned.
There are two main types of interference: constructive interference and destructive interference.
1. Constructive Interference: Constructive interference occurs when the crests of two waves coincide, resulting in a wave with an increased amplitude. When two waves are in phase (i.e., their crests and troughs align), their amplitudes add up, leading to a brighter region in the interference pattern. This reinforcement of the waves leads to constructive interference.
2. Destructive Interference: Destructive interference occurs when the crest of one wave aligns with the trough of another wave, resulting in cancellation or reduction of the wave's amplitude. When two waves are out of phase (i.e., their crests and troughs are misaligned), their amplitudes subtract from each other, leading to a darker region in the interference pattern. This cancellation of the waves leads to destructive interference.
Chap 10 part 2 Wave Optics
00:00:00 Introduction
00:04:21 Principle of Superposition of Waves
00:10:12 Interference of Light
00:16:15 Young’s Double Slit Experiment
00:25:04 Conditions for Constructive & destructive Interference
00:40:40 Expression for intensity at any point in interference pattern
00:44:29 numericals
00:52:34 Constructive Interference (Maxima)
00:58:14 Destructive Interference (Minima)
01:00:44 Coherent & Incoherent Sources
01:02:06 Need of Coherent Sources
01:08:42 Two independent sources cannot be coherent
01:12:58 Conditions for obtaining two coherent sources of light
01:15:14 Theory of Interference Fringes
01:22:09 Fringe Width
01:22:56 numericals
01:42:15 Sustained interference pattern
01:43:02 Conditions for sustained interference
01:45:39 Intensity Distribution Curve for Interference
01:46:47 Conservation of Energy in Interference
01:51:02 Comparison of Intensities at Maxima & Minima
01:53:10 numericals
02:05:08 Interference Pattern with White Light
02:10:14 Interference in Thin Films
02:12:05 Displacement of Interference Fringes