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  • The energy of one quantum of light with a wavelength of 6500(1 = 10-10m) is:Option: 1 5 x 10-18J<div class='qna-o

The energy of one quantum of light with a wavelength of 6500(1 = 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)

best_answer

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.

  1. The nature of emission of radiation from hot bodies (black -body radiation).

  2. Ejection of electrons from a metal surface when radiation strikes it (photoelectric effect).

  3. Variation of heat capacity of solids as a function of temperature.

  4. Line spectra of atoms with special reference to hydrogen.

-

 

We know that the equation for energy is given as:

 

E\, =\, h\frac{c}{\lambda }
\mathrm{E\, =\, 6.626\, \times \, 10^{-34}\, \frac{3\, \times \, 10^{8}}{6500\, \times \, 10^{-10} }}
\mathrm{E\, =\, 3.06\, \times\, 10^{-19}J }

Therefore, Option(2) is correct

Posted by

vishal kumar

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