Light from My Understanding

Please note this topic is explained from my own understanding, thus some info in this topic could be incorrect. Please feel free to correct me if I'm wrong.

 

 https://youtu.be/Iuv6hY6zsd0

 

As seen on the above video at Minute 3:35, 5:05 and 5:30, similar to water which is made of molecules/particles that can acts as waves, light is also made up of particles that can acts as waves. Remember we can only see visible part of EM spectrum using our bare eyes. What is light made up of? Many things can create light (light sources)!

(I disagree with Minute 4:15 of the video because the steam/flow of visible and invisible light, not just single light particle, are let into the double slit box.)

Applying the discontinuous theory of matter in which nearly everything is made up of atoms, and

atoms are made up of electrons and quarks.
 

Electrons occupy a space that surrounds an atom's nucleus.

Quarks make up protons and neutrons, which, in turn, make up an atom's nucleus.
In other words, protons and neutrons are made of even smaller particles called quarks.

 

What is light made up of? Click here for examples of proposed answers

It is believed that electrons and quarks are elementary particles. That means they aren’t made up of anything else. Are they!

Electromagnetic (EM)  Spectrum

Visible light have a wavelength from 400 nanometers to 700 nanometers, depending on the color. In contrast, atoms have a width of about 0.2 nanometers. This is why you can't see individual atoms using an optical microscope because visible light are too big to pass through/among them.

 

However, the shorter wavelengths, such as X-rays and ultraviolet light can pass among/through atoms because they are smaller, allowing theorists and scientists to get a glimpse of the atomic world. Please note that we can't see this part / these parts of EM spectrum.

Thus certain lights whose sizes (aka wavelengths) are smaller than atoms can pass through/among atoms because these lights are smaller.

 

 

Electrons are particles and can act like waves, just like water making up a lake as seen on the VDO above.

 

 

Examples of the properties of light: reflection, refraction, dispersion, scattering, absorption, interference, diffraction, polarisation

 

 

Examples of confused terms:

light = particles that act as waves (just like water in the lake as seen on the VDO)

wave = radiation = energy =>  They are the same thing in different contexts. For example, the energy carried by electromagnetic wave/radiation/light is proportional to the frequency of the wave. 

With the reference to the image of EM spectrum above, the smaller the particle size/wavelength, the higher the frequency, and the higher the energy.

Only two frequencies 13.56 and 27.12 MHz (megahertz) are permitted in electrology. Click here for more discussion regarding radio frequencies used in electrology.

With reference to EM spectrum, when u r talking about light, you are also talking about colours. Remember! we can see only visible part of EM spectrum. So, what are colours of other invisible part of EM spectrum as seen by other animals if they can perceive them?

 

colour = wavelength => They are the same thing in different contexts. Each colour has different wavelength, whose particle size is different. Since different sizes/wavelengths carry different energy, different colours carry different energy.

Intensity is measured in units of energy over the area and time. In other words, it's the amount of energy that is carried over a certain area in a certain amount of time.
 

When talking about sound/radio waves, we describe different levels of intensity using the decibel scale, as a measure of volume. The volume is the perception of loudness from the intensity of a sound wave. The higher the intensity of a sound, the louder it is perceived in our ears, and the higher volume it has. Since intensity is a function of energy, and energy is related to amplitude, then we can make the conclusion that the volume of a sound is proportional to the amplitude of the sound wave.

 

In optics, we describe different levels of intensity using the term, fluence. The fluence of a laser pulse is the energy delivered per unit area, J / cm2 (joules per square centimeter).

 

 

My debate on double slit experiment:

Why did they compare behaviour of light with sand in the double slit experiment? Does sand behave like water in the lake as seen in the video? Isn't the concept of fluidity applied to sand, but water? When sand can act as waves? In which situations? What does it take to cause sand to act as waves, which factors? I believe factors to cause light and sand to act as waves are different, aren't they?

The VDO comparing double slit experiment of light with water is more easily understandable than the one using sand.

If light are particles that act as waves:

Just like one water compound/molecule are made of two hydrogen atoms and one oxygen atom, if visible light are made of particles, where these particles locate in OUR periodic table?

Is/Are visible light(s) gas, liquid or solid at our room temperature?

 

Other topics:

-- Laser Hair Removal (LHR)

-- Electromagnetic Waves: Link I and Link II

-- Wavelength vs Frequency