Consider the following three electromagnetic waves: Microwaves ( M...

The energy of a photon is given by $E = \dfrac{hc}{\lambda}$, where $\lambda$ is the wavelength.

The order of wavelengths for the given electromagnetic waves is:
$\lambda_{Ultraviolet} < \lambda_{Infrared} < \lambda_{Microwaves}$

Since photon energy is inversely proportional to wavelength, the order of their energies is:
$E_{Microwaves} < E_{Infrared} < E_{Ultraviolet}$

Thus, the correct increasing order is $E_M < E_I < E_U$.

Answer: $E_M < E_I < E_U$