Light of wavelength 15 x 10^-7 m consists of photons whose energy is;
Correct answer: B. 1.32 x 10^-19J
- A. 1.7 x 10^-15J
- B. 1.32 x 10^-19J
- C. 1.1 x 10^-27J
- D. 1.1 x 10^-48J
Explanation
The correct answer is 1.326x10^-19.Changes: making option B 1.326x10^-19 Explanation: As , E = hv E = hc / lamda E= (6.63X10^-34) (3.0x10^8)/(15x10^-7)
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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.
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