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JIPMER 2019
Exam
JIPMER
Year
2019
Subject
Physics
Chapter
Dual Nature of Matter

JIPMER 2019 · Physics · Dual Nature of Matter

If frequency of a photon is 6 × 10^ 14 ~Hz , then find its...

If frequency of a photon is 6×1014 Hz6 \times 10^{14} \mathrm{~Hz}, then find its wavelength. [Take, speed of light, c=3×108 m/s\mathrm{c}=3 \times 10^8 \mathrm{~m} / \mathrm{s} ]

Options

  1. A500A˚500 Å
  2. B500nm500 nm
  3. C200A˚200 Å
  4. D200nm200 nm

Correct answer

B. 500nm500 nm

Step-by-step solution

Given, Frequency of photon (v)=6×1014 Hz(v)=6 \times 10^{14} \mathrm{~Hz} Speed of light (c)=3×108 m/s(\mathrm{c})=3 \times 10^8 \mathrm{~m} / \mathrm{s} ∴\therefore Wavelength of photon λ=cv\lambda=\frac{\mathrm{c}}{\mathrm{v}} =3×1086×1014=0.5×10−6=500×10−9=500 nm=\frac{3 \times 10^8}{6 \times 10^{14}}=0.5 \times 10^{-6}=500 \times 10^{-9}=500 \mathrm{~nm}
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