# Definition of Wavelength

## What is Wavelength?

Well, it’s quite simple really. Wavelength is the distance the ray of light is from your object at a point in space, or in a “target”, as it were.

So the object that is behind you or in front of you, has a wavelength of zero. Since there is no possibility for any further ray of light to travel from the object that is behind or in front of you, you can say that the object has zero wavelengths. Wavelength = 0.

In other words, there are no more rays of light, beyond this point, coming from the object that is behind you.

### Who Discovered Wavelength?

In the 17th century, Isaac Newton discovered that prisms could disassemble and reassemble white light, allowing the researchers to determine the specific wavelengths involved in the process.

As with all complex scientific discoveries, a huge amount of further work had to be done to establish that this process was so profound and that the prism worked in all cases. In the 1880’s, the discovery was confirmed when German scientist Charles Wenk demonstrated that all forms of light were created from a repeating pattern of interlaced horizontal lines. The repeating patterns were ultimately determined to be changed in the refractive index, of a spherical prism.

### Definition of Wavelength

Wavelength is the distance to an observer from a celestial object. The amount of space between the source and observer is determined by the amount of light emitted by the object and the observer. The closer the source and the observer, the more time will have passed between the observation and emission of the light, thereby decreasing the wavelength.

The lengths of wavelengths do not necessarily have to be equal. For example, the red wavelengths on a yellow or blue telescope are not always the same. This is because many sunspots, moons, and comets emit red light and can be quite close to the observer.

### What is the wavelength frequency?

Each color has a different wavelength. The question is, at what wavelength frequencies does a photon travel? The fundamental wavelength for light is the wavelength the light had when it was emitted from the Sun. But the Sun is very far away. Light from the Moon, on the other hand, travels far faster because it is only about 40,000 km away. Its wavelength is also so short that it does not go far beyond the density of the atmosphere. Thus, the relative speed of light through the atmosphere versus that through space is the same.

So, that’s the speed of light in the atmosphere. And then there is light which comes from the sky at the most distant wavelengths. These are the rainbow colors, which are so fascinating to observe.

### What is called frequency?

This means that when you receive a message (if you’re using a SIM card), the network follows the frequency (or channels) of that signal (if your phone, it will use your actual carrier’s signal).

Sometimes frequencies don’t match up with each other – for example – the signal strength of the carrier’s signal is often more weak than that of its roaming partner. You get messages when the two signals are closer together.

### What is the relation between wavelength and frequency?

The difference between frequency and wavelength: It’s not all that big!

Remember that one of the fundamental units of electromagnetic radiation is the frequency. As you know, these numbers are defined in cycles per second, or “cycles per hour”. Then, by adding up the various units of electromagnetic radiation, we arrive at the wavelength. Here is a graphic representation:

The wavelength depends on the speed of the material, the medium, and the location: So, if we want to find out how long something is, we have to know the location. At the lowest speeds, the distances between the object and the source are relatively small. Therefore, the time to complete a given trip is an efficient estimate of the length of the trip.

### What are the types of wavelengths?

They are electromagnetic, acoustic, ultraviolet, X-ray, gamma-ray, and sub-micron radiation. They are all available to different parts of the body at different wavelengths.

### The final thoughts of wavelength.

Imagine a beam of light emitted from a particular type of electron moving through a specific way. In this scenario, the electron has a particular momentum. However, for the beam to pass through the medium (such as a molecule) it must fall into the plane of the material (such as a surface) at a specific angle. This is called the angle of incidence.

At any given point in the wavelength of this beam, the momentum of the electron in the medium is proportional to the angle between its position and the direction the energy of the photon is traveling. We can think of this as the frequency of the emitted beam (0.5% of a wavelength = 0.00005%, in our case).