Answer:
1.3*10^-30m
Explanation:
The energy of the bond= energy of the photon.
E=hf f=E/h= 155*10^3/6.6*10^-34= 23.5*10^37 Hz
But V=wavelength* frequency
Wavelength= 3*10^8/23.5*10^37 = 1.3*10^-30 m
Note, speed of a photon of light= 3*10^8 ms-1
Answer:
772 nanometers.
Explanation:
The maximum wavelength of light corresponds to minimum energy required to break one mole of flourine-flourine single bond which is 155 kJ.
Energy required to break one F-F bond is [tex]\frac{155}{6.023 \times 10^{23} }[/tex] kJ.
Energy of photon is given by:
E=\frac{nhc}{\lambda}[/tex]
where
n = number of photons h=[tex]6.626 \times 10^{-34}[/tex]Js and [tex]\lambda[/tex]=wavelength of photon and c=[tex]3 \times 10^{8}[/tex][tex]\frac{m}{s}[/tex]
In this question E=[tex]\frac{155 \times 10^{3}}{6.023 \times 10^{23} }[/tex]
and n=1
Substituting appropriate values in the above equation, we get:
[tex]\lambda=0.77242\times 10^{-6}[/tex] metres
=772.42 nanometers
=772 nanometers as value given in the question has 3 significant digits.
