A Monochromatic Light Wave in Vacuum Has Frequency F₀ and Wavelength

question 85

Multiple Choice

A monochromatic light wave in vacuum has frequency f₀ and wavelength l₀.Which of the following are also possible frequency and wavelength combinations for a monochromatic light wave in vacuum?

• A)2f₀,2l₀
• B)f₀/2,l₀/2
• C)2f₀,l₀/2
• D)None of the above are possible.

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