Compare the wavelength or frequency range of the visible light our eyes can see

Question

Compare the wavelength or frequency range of the visible light our eyes can see to the range of radio light.

Red wavelength = 700 nanometers, frequency = 4.29 x 1014 Hz
Violet wavelength = 400 nanometers, frequency = 7.5 x 1014 Hz

Radio (AM radio) wavelength = 555 m, frequency = 5.4 x 105 Hz (540 kHz)
Microwave (microwave oven) wavelength = 12 cm, frequency = 2.5 x 109 Hz

What is the ratio of red to violet light compared to the ratio of AM radio to microwaves? Give the ratios for either wavelength or frequency.

Explanation / Answer

Radio waves are certainly "light," as is any electromagnetic radiation. It just isn't visible light.

Ratio means divide the two numbers. so do the division
visible, 7.5/4.29 = 1.75
radio 2.5e9 / 5.4e5 = 0.46e4 = 4600

but radio is not light

and radio waves actually cover a much wider range.

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