The correct answer is option 1: X-rays. X-rays carry the maximum energy per photon compared to the other options given.

To understand why X-rays carry more energy, we need to understand the concept of the electromagnetic spectrum. The electromagnetic spectrum is a range of wavelengths or frequencies of electromagnetic radiation, including X-rays, radio waves, light waves, and microwaves.

The energy of a photon is directly related to its frequency or inversely related to its wavelength. Higher frequency or shorter wavelength photons have more energy.

Among the options given, X-rays have the shortest wavelength and the highest frequency. This means that X-rays have a higher energy per photon compared to the other options. X-rays are often used in medical imaging because their high energy allows them to pass through body tissues and create detailed images.

Radio waves, on the other hand, have the longest wavelength and the lowest frequency among the given options. They have lower energy per photon compared to X-rays.

Light waves, including visible light, have intermediate wavelengths and frequencies and carry less energy per photon than X-rays.

Microwaves have shorter wavelengths and higher frequencies than radio waves but still have lower energy per photon compared to X-rays.

In summary, X-rays carry the maximum energy per photon among the given options,