For two lights of different frequencies. If f2 > f1 then:
Correct answer: A. λ1>λ2
- A. λ1>λ2
- B. λ1=λ2
- C. λ2>λ1
- D. λ1≥λ2
Explanation
If the second light has a higher frequency than the first, then the first must have the longer wavelength. When the speed is the same (like in vacuum), a higher frequency always means a shorter wavelength.
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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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