An excited hydrogen atom emits a photon when an electron transitions to a lower…

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

An excited hydrogen atom emits a photon when an electron transitions to a lower energy level, releasing

3.03\times10^{-19}\,\text{J}

of energy. With

c=3.00\times10^{8}\,\text{m\,s}^{-1}

and

h=6.63\times10^{-34}\,\text{J\,s}

provided, in which region of the electromagnetic spectrum does this photon lie? (a)

\text{Infrared}

(b)

\text{Visible red}

(c)

\text{Ultraviolet}

(d)

\text{Microwave}