Energy Conservation in Interference – Rankers Physics

Principle of Superposition, Interference and Beats: Practice Problem & Solution

Assertion (A): Energy is created during constructive interference and destroyed during destructive interference. Reason (R): The positions of constructive interference are sources of energy while the positions of destructive interference are sinks of energy.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Principle of Superposition, Interference and Beats. Understanding the underlying formula is key to arriving at the correct answer below:

Energy is always conserved in interference phenomena; it is merely redistributed, not created or destroyed. Thus, both Assertion (A) and Reason (R) are false.

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Similar Practice Questions

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1. If a string fixed at both ends vibrates in three loops, the wavelength is \(30\text{ cm}\). The length of string is:
2. Assertion (A): Interference can happen in sound waves. Reason (R): In Quincke's tube, interference is present due to initial phase difference as well as the phase difference due to path difference.  
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