Question
The Bohr model of atoms
In these orbits, angular momentum of electron can have magnitude as
$\frac{h}{2 \pi^{\prime}} \frac{2 h}{2 \pi^{\prime}} \frac{3 h}{2 \pi} \cdots \cdots \cdot$ etc $,$ but never as $\frac{1.5 h}{2 \pi^{\prime}}, \frac{2.5 h}{2 \pi^{\prime}}, \frac{3.5 h}{2 \pi} . \ldots . . .$ etc.
This is called the quantisation of angular momentum.
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Reason $R$.
Assertion $A :$ An electron microscope can achieve better resolving power than an optical microscope.
Reason $R$ : The de Broglie's wavelength of the electrons emitted from an electron gun is much less than wavelength of visible light.
In the light of the above statements, choose the correct answer from the options given below
${}_3^7Li$ + ${}_1^1H \to $ $2{}_2^4He$ $+Q$
the value of enery $Q$ released is.........$MeV$