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Dual Nature of Radiation question

2012 · Shift 1 · Q58
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Dual Nature of Radiation question

2012 · Shift 1 · Q58

JEE AdvancedPhysicsDual Nature of RadiationNumerical+4 / −1
A proton is fired from very far away towards a nucleus with charge Q = 120e, where e is the electronic charge. It makes a closest approach of 10 fm to the nucleus. The de Broglie wavelength (in units of fm) of the proton at its start is ‾\underline{\hspace{2cm}}​. (Take the proton mass, mp=(5×3)×10−27{m_p} = (5 \times 3) \times {10^{ - 27}}mp​=(5×3)×10−27 kg; h/e=4.2×10−15h/e = 4.2 \times {10^{ - 15}}h/e=4.2×10−15 J.s/C; 14πε0=9×109{1 \over {4\pi {\varepsilon _0}}} = 9 \times {10^9}4πε0​1​=9×109 m/F; 1 fm = 1015 m.)
Numerical answer
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