Which of the following electromagnetic waves has the smallest wavelength?

Explanation

Gamma rays have the smallest wavelength of all electromagnetic waves, making them the highest in energy. They are positioned at the extreme end of the electromagnetic spectrum. X-rays, while also having short wavelengths, are longer than gamma rays. Microwaves and ultraviolet rays have significantly longer wavelengths compared to gamma rays, with microwaves being one of the longest in the spectrum.