The conservation law of energy holds good for the phenomenon of interference as well as diffraction. Due to interference or diffraction we obtain maxima and minima intensities at different points. From points of minima intensity the energy has been shifted to the points of maximum intensity. Thus, there is a redistribution of energy but total energy must remain conserved. The energy lost at minimas exactly reappears at diffraction maximas and the total energy.
Class 12 Physics Chapter 10 Wave Optics Session 2024-2025.
Does the appearance of bright and dark fringes in the interference pattern violate, in any way, conservation of energy? Explain.
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The appearance of bright and dark fringes in an interference pattern does not violate the conservation of energy. Energy is redistributed, not lost. In regions of constructive interference (bright fringes), energy is concentrated, while in destructive interference (dark fringes), it is minimized. The total energy across the pattern remains constant, adhering to the principle of conservation of energy.
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