Physics

Problem

A hydrogen atom changes its state from

n = 3

n = 2

. Due to recoil, the percentage change in the wave length of emitted light is approximately

1 \times 10^{-n}

. The value of

n

is ______. [Given

Rhc = 13.6 \text{ eV}

hc = 1242 \text{ eV nm}

h = 6.6 \times 10^{-34} \text{ J s}

mass of the hydrogen atom

= 1.6 \times 10^{-27} \text{ kg}

]