Structure Of Atom Ques 1
1. Calculate the energy in joule corresponding to light of wavelength $45 $ $nm$ :
(Planck’s constant $h=6.63 \times 10^{-34} Js$; speed of light $c=3 \times 10^{8}$ $ ms^{-1}$ )
[2014]
(a) $6.67 \times 10^{15}$
(b) $6.67 \times 10^{11}$
(c) $4.42 \times 10^{-15}$
(d) $4.42 \times 10^{-18}$
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Answer:
Correct Answer: 1.(d)
Solution:
- (d) $E=\frac{h c}{\lambda}=\frac{6.63 \times 10^{-34} \times 3 \times 10^{8}}{45 \times 10^{-9}}$
$=4.42 \times 10^{-18} $ $J$
BETA
