A radio wave from a broadcast tower can be longer than a soccer field. A gamma ray from a hospital machine is shorter than an atom. They do not look like relatives.
They are. Both are oscillating electric and magnetic fields on the move. This lesson lines every electromagnetic wave up on one scale: the electromagnetic spectrum.
Earlier in this topic, you saw what an electromagnetic wave is: an electric field and a magnetic field, oscillating together as the wave travels.
A radio wave is exactly that. So is a gamma ray. So is visible light.
The differences between them come down to two linked numbers: wavelength and frequency.
The band names are familiar: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Those names mark stretches of wavelength. They do not mark different kinds of wave.
Lined up by wavelength, the bands form one continuous scale with no gaps between them: the electromagnetic spectrum.
Radio waves and gamma rays are the same kind of wave at very different wavelengths.
One reading note: on a drawn spectrum, each band's width is picked for readability. Width is not data. The order of the bands and the two direction arrows carry all the meaning.
A microwave from an oven and an X-ray from a clinic machine. Are they different kinds of wave?
Each is an oscillating electric field and magnetic field traveling along.
They differ in wavelength and frequency, nothing else.
No. They are the same kind of wave, sitting in different bands of the electromagnetic spectrum.
Wanda reads that ultraviolet is a completely different kind of radiation from visible light. What actually differs between them?
Both are oscillating electric and magnetic fields.
Ultraviolet has shorter wavelengths and higher frequencies than visible light.
Only the wavelength and the frequency differ. The kind of wave is the same.
An infrared wave and an ultraviolet wave travel through the same vacuum. In what ways do they differ?
Radio waves and X-rays are both electromagnetic waves. What makes a radio wave a radio wave rather than an X-ray?
Viggo says: 'A radio wave and a gamma ray are the same kind of wave at very different wavelengths.' Is Viggo correct?
Which statement describes the electromagnetic spectrum?
A microwave oven's waves and a dentist's X-rays are compared. Which statement is correct?
Two electromagnetic waves sit in different bands of the spectrum. Which statement must be true?