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Consider: radio waves (r), visible light (v), infrared light (i), x-rays (x), and ultraviolet light (u). In order of increasing frequency, they are ?

Consider: radio waves (r), visible light (v), infrared light (i), x-rays (x), and ultraviolet light (u). In order of increasing frequency, they are ?

Explanation

The electromagnetic spectrum in order of increasing frequency (and energy) is:

  1. Radio waves (lowest frequency)

  2. Infrared (i)

  3. Visible light (v)

  4. Ultraviolet (u)

  5. X-rays (x) (highest frequency among these)

So, the correct sequence from lowest to highest frequency is:
radio (r) < infrared (i) < visible (v) < ultraviolet (u) < x-rays (x)