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10 Question-answer on Wave nature of particle (de-broglie wave) 1.        A proton and alpha particle are accelerated through the same potential difference. The ratio of their de-Broglie wavelength will be: (a)     1:1 (b)    1:2 (c)     2:1 (d)    2√2:1 Ans: (d) 2.        A particle with rest mass m 0 is moving with speed of light c. the de-Broglie wavelength associated with it will be: (a)     ∞ (b)    Zero (c)     M 0 c/h (d)    Hv/m 0 c. Ans: ( b) 3.        The ratio of wavelengths of proton and deuteron accelerated through the same potential difference will be: (a)     1:2 (b)    2:1 (c)     √2:1 (d)    1:√2 Ans: ( c) 4.        Through what potential difference should an electron ...