સમય = અંતર/ તરંગનો વેગ
$= \,\,\frac{{8\,\, \times \,\,{{10}^{10}}\,m}}{{3\,\, \times \,\,{{10}^8}\,m/s}}\,\, = \,\,2.66\,\, \times \,\,{10^2}\,s\,\,\, = \,\,4\,\,\min \,\,26\,s$
$n = 3, l = 1, m_l = 0$
$(h\, = 6.625\times10^{-34}\, J\,s,\, c\, = 3\times10^8\, m\,s^{-1})$
$(1)$ $n = 1,\,l = 0,\,m = 0$
$(2)$ $n = 2,\,l = 0,\,m = 0$
$(3)$ $n = 2,\,l = 1,\,m = 1$
$(4)$ $n = 3,\,l = 2,\,m = 0$
$(5)$ $n = 3,\,l = 2,\,m = 0$