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  • The energy of a photon in Joules that has a wavelength of 9.0m is:Option: 1 6.0 ×10-23

The energy of a photon in Joules that has a wavelength of 9.0m is:

Option: 1

6.0 ×10-23


Option: 2

4.5 ×1025


Option: 3

4.5 × 10-25


Option: 4

2.2 ×10-26


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}}{9}}
\mathrm{E\, =\, 2.2\, \times\, 10^{-26}J }

Therefore, Option(4) is correct

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