A) 4000 \[\frac{{{e}^{2}}h}{2\pi h}\]
B) 5000 \[\frac{2\pi {{e}^{2}}}{hc}\]
C) 6000 \[{{M}_{neutron}}\]
D) 5500 \[{{M}_{proton}}\]
Correct Answer: A
Solution :
Refractive index \[\frac{3}{2}M{{R}^{2}}\] \[\frac{5}{2}M{{R}^{2}}\] \[5.26\times {{10}^{3}}\] \[({{R}_{e}}=6.37\times {{10}^{6}}m)\] \[mg{{R}_{e}}\,.\]
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