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11.Dual Nature of Radiation and matter
easy
કિરણપુંજની તરંગ લંબાઈ $6.20 \times 10^{-5}\ cm$ હોય, તેવા ફોટોનની ઊર્જા ....... $eV$ છે.
A
$1$
B
$0.01$
C
$2$
D
$0.02$
Solution
$\lambda \,\, = \,\,6.12\,\, \times \,\,1{0^{ – 5}}\,cm$
$\,\,\,\,\,\,\, = 6.12\, \times \,\,{10^{ – 7}}\,m\,\, = \,\,612\,\,nm$
$E = \frac{{hc}}{\lambda } = \frac{{1240}}{{612}} = eV = 2.0\,eV$
Standard 12
Physics
