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Photon Energy, Number of Photons and Intensity for GSEB: 9 solved questions

Real GSEB paper questions on photon energy, number of photons and intensity, part of dual nature of matter and radiation. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2015 to 2023. No sign-in needed to read them.

What this topic asks

• Photon energy, momentum and mass — 7 questions
• Counting photons — 1 question
• Units and dimensions — 1 question

All 9 questions with solutions

• Mass of a photon in motion is . GSEB Board July 2016
• Energy of a photon is E = hf and its momentum is P = h/λ, where λ is the wavelength of the photon. With this… GSEB Board March 2018
• Monochromatic light of frequency 6×10¹⁴ Hz is produced by a laser. Each photon has an energy of J. GSEB Board March 2020
• Monochromatic light of frequency 6.0×10⁸ MHz is produced by a laser. The power emitted is 2×10⁻³ W. What is t… GSEB Board August 2020
• Which of the following physical quantities has the same unit as Planck's constant? GSEB Board July 2021
• Energy 4000 h u of radiation of frequency u contains photons. GSEB Board July 2022
• What is the energy carried by a photon of frequency 6.0×10¹⁴ Hz? GSEB Board July 2022
• Monochromatic light of frequency 6×10¹⁴ Hz is produced by a laser. The power emitted is 2×10⁻³ W. The energy… GSEB Board March 2023
• Which of the following physical quantities has the dimension of Planck's constant (h)? GSEB Board July 2015