The wavelength of light beam "A" is twice the wavelength of light beam "B" The energy of a photon in beam "A" is:
Correct answer: A. Half the energy of a photon in beam B
- A. Half the energy of a photon in beam B
- B. One-fourth the energy of a photon in beam B
- C. Equal to the energy of a photon in beam B
- D. Twice the energy of a photon in beam B
Explanation
Since energy is inversely proportional to wavelength, doubling the wavelength cuts the energy in half. So a photon in beam A has half the energy of a photon in beam B.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.