Electromagnetic Waves all have constant velocity which are equal to the speed of light. It is only the frequency of the wave that differentiates ie between radio, gamma, X-ray. The velocity is always fixed at 3 x 10^8 ms^-1 which is equivalent to the speed of light.
Electromagnetic waves in a vacuum all travel at the same velocity, the speed of light (about 3 x 10^8 m/s).
Gamma waves have the highest frequency (and energy) of all the electromagnetic waves. Gamma Ray Bursts (GRB) from outer space (and that's about all we know of them!) have extraordinary high energies, and hence frequencies.
Ultrasonic waves are high frequency sonic waves. They're sound, which is mechanical energy. Electromagnetic waves are waves of electromagnetic energy, like radio waves or light. Mechanical energy is different from electromagnetic energy, hence the reason for ultrasonic waves not taking the form of electromagnetic waves.
because sound waves are not a electromagnetic waves because they need a medium for travel....hence electromagnetic spectrum is based on the electromagnetic waves ..like radio waves , micro waves , etc....
electromagnetic waves are longitudinal (like a slinky).
In a vacuum, all electromagnetic waves have equal velocity.
The question is not quite clear. The speed of electromagnetic waves has been measured, in a great number of experiments of increasing precision and accuracy over the past 150 years, and is now known correctly to within 5 parts per billion.
No as they are both electromagnetic waves so have the same velocity but have differing wavelengths and frequencies.
Frequency
by the property of reflection or electromagnetic waves
P waves (PRIMARY Waves) have the highest average velocity as they travel through the earth's materials.
Meters per second
Electrons impact at high velocity on a tungsten anode. The tungsten emits the X-Rays, which are the electromagnetic waves.
Electromagnetic waves are limited to velocity "c". But time has no speed limit.
Electromagnetic waves in a vacuum all travel at the same velocity, the speed of light (about 3 x 10^8 m/s).
One would need more information to answer that question.
In any one material all electromagnetic waves have the same velocity. Electromagnetic waves traveling through a medium travel at the same speed.