One of the important characteristics of the MOST suitable metal for photoelectric emission is that it
Correct answer: B. Has low work function.
- A. Has shiny surface.
- B. Has low work function.
- C. Has high threshold energy.
- D. Is sensitive to the frequency of light.
Explanation
The most suitable metal for photoelectric emission is characterized by a low work function. This means the energy required to release electrons is minimal, making it easier for the metal to emit electrons when exposed to light. Option A describes a property that affects reflectivity rather than electron emission capability. Option C suggests a high energy requirement, which is not suitable for photoelectric emission. Option D mentions sensitivity to light frequency, but the work function remains the primary factor in determining photoelectric suitability.
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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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