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Dual Nature of Radiation and Matter question

2021 · Q133
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Dual Nature of Radiation and Matter question

2021 · Q133

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1
The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600nm, when it delivers the power of 3.3 ×\times× 10−-−3 watt will be : (h = 6.6 ×\times× 10−-−34 Js)
  1. A
    1015
  2. B
    1018
  3. C
    1017
  4. D
    1016
View written solutionFree

Correct answer: D

p=nhcλ⇒n=pλhcp = {{nhc} \over \lambda } \Rightarrow n = {{p\lambda } \over {hc}}p=λnhc​⇒n=hcpλ​

n=3.3×10−3×600×10−96.6×10−34×3×108=1016n = {{3.3 \times {{10}^{ - 3}} \times 600 \times {{10}^{ - 9}}} \over {6.6 \times {{10}^{ - 34}} \times 3 \times {{10}^8}}} = {10^{16}}n=6.6×10−34×3×1083.3×10−3×600×10−9​=1016

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