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Electromagnetic Waves

Question

If $λ_{ν}, λ_{x} and λ_{m}$ represent the wavelengths of visible light, X-rays and microwaves respectively, then

$λ_{m} > λ_{x} > λ_{ν}$

$λ_{v} > λ_{m} > λ_{x}$

$λ_{m} > λ_{v} > λ_{x}$

$λ_{v} > λ_{x} > λ_{m}$

Solution

$λ_{m} > λ_{v} > λ_{x}$

Wavelength order of given rays are listed below:

Obviously, $λ_{x} < λ_{ν} < λ_{m}$

$or λ_{m} > λ_{v} > λ_{x}$

Visible light, X-rays and microwaves are all electromagnetic waves.