Two electrons are moving with non-relativistic speeds perpendicular to each other. If corresponding de…

1. $\frac{1}{{\lambda }_{CM}}=\frac{1}{{\lambda }_1}+\frac{1}{{\lambda }_2}$
2. ${\lambda }_{CM}=\frac{2{\lambda }_1{\lambda }_2}{\sqrt{{{\lambda }_1}^2+{{\lambda }_2}^2}}$
3. ${\lambda }_{CM}={\lambda }_1={\lambda }_2$
4. ${\lambda }_{CM}=\frac{{\lambda }_1+{\lambda }_2}{2}$

Solution

Asked in: JEE Main 2018 (15 Apr)

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