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Visible light and ultraviolet (UV) light are both forms of electromagnetic radiation, and waves of each travel at the same speed. Human eyes are unable to see UV light because it is not in the visible range of the electromagnetic spectrum. If the frequency of one UV light wave is twice that of a visible light wave, how will their wavelengths compare? A. The wavelength of the UV light wave will be half that of the visible light wave. B. The wavelength of the UV light wave will be twice that of the visible light wave. C. The wavelength of the UV light wave will be four times that of the visible light wave. D. The wavelength of the UV light wave will be the same as that of the visible light wave.

Sagot :

If the frequency of one UV light wave is twice that of a visible light wave, then the wavelength of the UV light wave will be half that of the visible light wave (Option A)

  • UV is a type of electromagnetic radiation that shows a range of wavelengths from 10 nanometers (nm) to 400 nm, whereas visible light shows a range of wavelengths from 400 to 700 nm (0.4 to 0.7 µm).

  • UV light exhibits a higher frequency and shorter wavelength than visible light.

  • The frequency is a unit measured in Hertz (Hz) which indicates the number of cycles (i.e., the waves) that pass a point in space during one sec.

  • The longest wavelength of visible light is the red color (700nm), whereas and the shortest visible wavelength is blue (400nm).

  • The frequency of the visible light ranges from 7.5×10¹⁴ Hz (blue color) to 4.3×10¹⁴ Hz (red color); whereas the frequency of UV light ranges from 800 terahertz (THz) to 30,000 THz.

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