MCQ
Age of a tree is determined using radio-isotope of
- ✓Carbon
- BCobalt
- CIodine
- DPhosphorus
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[Use $hc =1242 eV nm ; 1 nm =10^{-9} m , h$ and $c$ are Planck's constant and speed of light, respectively]
$(1)$ $\lambda_0=418 nm$
$(2)$ The ratio of kinetic energy of the electron in the state $n = m$ to the state $n =1$ is $\frac{1}{4}$
$(3)$ $m =2$
$(4)$ $\Delta p_{ a } / \Delta p _{ o }=\frac{1}{2}$

| $A$ | $B$ | $Y$ |
| $0$ | $0$ | $0$ |
| $0$ | $1$ | $1$ |
| $1$ | $0$ | $1$ |
| $1$ | $1$ | $1$ |
