Q. When a wave reflects off a fixed end, the reflected wave is __________.
जब कोई तरंग किसी निश्चित सिरे से परावर्तित होती है, तो परावर्तित तरंग __________ होती है।
Explanation
When a wave reflects from a fixed boundary, it undergoes a phase change of π (180°), resulting in inversion.
If the end is free, the wave reflects without inversion.
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