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NEET2019ChemistryStructure of AtomActual

A bulb is emitted electromagnetic radiation of 660 ~nm wavelength. The total energy of radiation is 3 10⁻¹⁸ ~J . The number of emitted photons will be (h=6.6 10⁻³⁴ ~J ~s , c=3 10^8 ~m / s )

Options

  1. A1
  2. B10
  3. C100
  4. D1000

Correct answer

B. 10

Step-by-step solution

Number of photons emitted =n aligned & E= n h c & 3 10⁻¹⁸= 6.6 10⁻³⁴ 3 10^8 n 660 10⁻⁹ & n= 30 3 =10 aligned

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