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Modern Physics - Photon Energy — Physics Questions & Practice

12 Modern Physics - Photon Energy questions from Physics for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong. का अभ्यास करें

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Modern Physics - Photon Energy पर अभ्यास प्रश्न — उत्तर सहित

Try each question first, then open the answer. Explanations are included.

1. A photon has a frequency of 2.5 x 10^14 Hz. What is its energy? (E = hf, h = 6.626 x 10^-34 J.s)

  1. A16.565 x 10^-20 J
  2. B33.13 x 10^-20 J
  3. C8.2825 x 10^-20 J
  4. D18.565 x 10^-20 J
उत्तर दिखाएँ

उत्तर: A

E = h x f = (6.626x10^-34) x (2.5x10^14) = 16.565 x 10^-20 J.

2. A photon has a frequency of 7 x 10^14 Hz. What is its energy? (E = hf, h = 6.626 x 10^-34 J.s)

  1. A46.382 x 10^-20 J
  2. B92.764 x 10^-20 J
  3. C23.191 x 10^-20 J
  4. D48.382 x 10^-20 J
उत्तर दिखाएँ

उत्तर: A

E = h x f = (6.626x10^-34) x (7x10^14) = 46.382 x 10^-20 J.

3. A photon has a frequency of 3 x 10^14 Hz. What is its energy? (E = hf, h = 6.626 x 10^-34 J.s)

  1. A19.878 x 10^-20 J
  2. B39.756 x 10^-20 J
  3. C9.939 x 10^-20 J
  4. D21.878 x 10^-20 J
उत्तर दिखाएँ

उत्तर: A

E = h x f = (6.626x10^-34) x (3x10^14) = 19.878 x 10^-20 J.

4. A photon has a frequency of 3.5 x 10^14 Hz. What is its energy? (E = hf, h = 6.626 x 10^-34 J.s)

  1. A23.191 x 10^-20 J
  2. B46.382 x 10^-20 J
  3. C11.5955 x 10^-20 J
  4. D25.191 x 10^-20 J
उत्तर दिखाएँ

उत्तर: A

E = h x f = (6.626x10^-34) x (3.5x10^14) = 23.191 x 10^-20 J.

5. A photon has a frequency of 6 x 10^14 Hz. What is its energy? (E = hf, h = 6.626 x 10^-34 J.s)

  1. A39.756 x 10^-20 J
  2. B79.512 x 10^-20 J
  3. C19.878 x 10^-20 J
  4. D41.756 x 10^-20 J
उत्तर दिखाएँ

उत्तर: A

E = h x f = (6.626x10^-34) x (6x10^14) = 39.756 x 10^-20 J.

Modern Physics - Photon Energy और प्रश्न हल करें

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