Q98649
Solution:
1."\\lambda =?; \\nu=7.30*10^{15}s^{-1}"
We know; "\\lambda=c\/ \\nu;" where "c=3*10^8 ms^{-1}" (speed of light)
"=3*10^8\/(7.30*10^{15})"
"=4.109*10^{-8}m."
"=41.096 nm."
2."\\nu =?; E=3.8*10^{-10}J"
We know ; "E=h\\nu" ; where "h=6.626*10^{-34} Js" (Planck's constant)
"\\implies \\nu=E\/h"
"=3.8*10^{-10}\/(6.626*10^{-34})"
"=5.735*10^{23}s^{-1}" .
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