एक \( \alpha \)-कण व एक प्रोटॉन की गतिज ऊर्जा समान है। इनमें किस कण की तरंगदैर्ध्य कम होगी?

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एक \( \alpha \)-कण व एक प्रोटॉन की गतिज ऊर्जा समान है। इनमें किस कण की तरंगदैर्ध्य कम होगी?
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