A node is a point where there is alwaysa)Constructive interferenceb)Destructive interferencec)Double troughd)Two crestsCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

A node is a point along the medium of no displacement. The point is not displaced because destructive interference occurs at this point.

Answer

A node is a point located along the medium of no displacement.The point is not displaced because of destructive interference is occur at this point so the correct option is B

Answer

Understanding Nodes and Interference
In wave phenomena, nodes are specific points along a standing wave where certain behaviors occur due to the superposition of two waves.
What is Destructive Interference?
- Destructive interference occurs when two waves meet in such a way that their crests align with the troughs of each other.
- This results in the cancellation of the waves, leading to points of zero amplitude.
Characteristics of Nodes
- Nodes are points where the amplitude of the wave is always zero.
- At these points, the waves are perfectly out of phase (180 degrees apart), leading to destructive interference.
Why Option B is Correct?
- The question specifically asks about points where there is 'always' interference.
- Since nodes consistently experience destructive interference, they exemplify points of zero amplitude in standing waves.
Other Options Explained
- Option A (Constructive interference): This occurs at antinodes, not nodes, where wave amplitudes add together.
- Option C (Double trough): While this may suggest some interference, it does not accurately define a node.
- Option D (Two crests): Again, this describes a point of constructive interference, which occurs at antinodes.
Conclusion
In summary, nodes are crucial in understanding wave behavior and are defined by the phenomenon of destructive interference. This is why option B is the correct answer. Understanding these principles is essential for grasping the fundamentals of wave mechanics in physics.

Similar Class 11 Doubts

Two identical narrow slits S1and S2are illuminated by light of wavelength l from a point source P. If, as shown in the diagram above the light is then allowed to fall on a screen, and if n is a positive integer, the condition for destructive interference at Q is that

The necessary condition for phenomenon of interference to occur is

In the adjacent diagram, CP represents a wavefront and AO and BP, the corresponding two rays. Find the condition on q for constructive interference at P between the ray BP andreflected ray OP. [JEE (Scr)2003]

Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _

Top Courses for Class 11View all

Chemistry Class 11

CUET Mock Test: Humanities Subjects 2025

English Class 11

Mathematics (Maths) Class 11

Psychology CUET UG Mock Test Series 2025

Top Courses for Class 11

Top Courses for Class 11

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams