Select the correct statement from the following :

Let's understand each option step by step.

Option A states: "Electromagnetic waves cannot travel in vacuum." This is incorrect because electromagnetic waves, such as light, radio waves, and X-rays, do not require a medium to propagate. They can travel through vacuum, which is why sunlight reaches Earth through the vacuum of space.

Option B states: "Electromagnetic waves are longitudinal waves." This is incorrect because electromagnetic waves are transverse waves. In transverse waves, the oscillations of the electric and magnetic fields are perpendicular to the direction of wave propagation. Longitudinal waves, like sound waves in air, have oscillations parallel to the direction of propagation.

Option C states: "Electromagnetic waves are produced by charges moving with uniform velocity." This is incorrect. A charge moving with uniform velocity (constant speed in a straight line) produces a steady electric field and a steady magnetic field, but it does not radiate electromagnetic waves. Electromagnetic waves are produced only when charges are accelerated, such as in an oscillating current in an antenna.

Option D states: "Electromagnetic waves carry both energy and momentum as they propagate through space." This is correct. Electromagnetic waves transport energy, which is evident when sunlight warms the Earth. They also carry momentum, which can exert radiation pressure on surfaces. This momentum transfer is described by the formula $$p = \frac{U}{c}$$ where $$p$$ is momentum, $$U$$ is energy, and $$c$$ is the speed of light.

Hence, the correct answer is Option D.