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The energy of one quantum of light with a wavelength of 6500 Ao (1 Ao = 10-10m) is

Option: 1

5 x 10-18J

 


Option: 2

3.06 x 10-19J

 


Option: 3

8.02 x 10-20J

 


Option: 4

9.0 x 10-24J


Answers (1)

As we learn

Planck’s Quantum Theory -

Atom and molecules could emit (or absorb) energy only in discrete quantities known as quanta and not in a continuous manner.

-

The energy of one quanta of light 

\mathrm{E= \frac{hc}{\lambda }= \frac{6.62\times10^{-34}\times3\times10^{8}}{6.5\times10^{-7}} = 3.06\times10^{-19}J}

 

Posted by

Sumit Saini

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