What is the approximate frequency range of visible light?

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Multiple Choice

What is the approximate frequency range of visible light?

Explanation:
Visible light sits in a narrow band of frequencies. Using the speed of light and typical visible wavelengths, roughly 380 to 750 nanometers, the frequency f = c/λ gives about 4×10^14 Hz for the red end and about 7×10^14 Hz for the violet end. So the approximate range is 4×10^14 to 7×10^14 Hz. The other options lie outside this band: 10^6–10^7 Hz are radio waves, 10^9–10^10 Hz are still far below visible, and 10^16–10^17 Hz correspond to ultraviolet and higher-energy photons.

Visible light sits in a narrow band of frequencies. Using the speed of light and typical visible wavelengths, roughly 380 to 750 nanometers, the frequency f = c/λ gives about 4×10^14 Hz for the red end and about 7×10^14 Hz for the violet end. So the approximate range is 4×10^14 to 7×10^14 Hz.

The other options lie outside this band: 10^6–10^7 Hz are radio waves, 10^9–10^10 Hz are still far below visible, and 10^16–10^17 Hz correspond to ultraviolet and higher-energy photons.

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