Light is one of the most important components in life, whether for humans, animals or plants. The process of photosynthesis in plants can only take place if there is light, while for humans the process of seeing can occur if there is light reflected from an object into our eyes.
We have experienced various benefits of light in our lives, but did you know there are many interesting things that exist in light. In this paper I will try various interesting things on light.
1. Dualism of the nature of light
Light turns out to have two properties, namely light as a wave and light as a particle. As a wave, light is an electromagnetic wave in the form of a transverse. As electromagnetic waves, light does not require a medium in its propagation, this is shown from sunlight reaching the earth where the space between the sun and the earth is a vacuum.
On the other hand light is formed as discrete molecules called photons, photons have energy. The energy of a photon is proportional to its wavelength and Planck’s constant. The nature of light as a visible wave in various experiments such as light interference in double slits and light diffraction. While the nature of light as a particle can be seen from the experiments of the Compton Effect and the Photoelectric Effect that scientists conducted.
2. The spectrum of light
A light is composed of a spectrum of light that varies from a wavelength of less than one nanometer to more than one meter. Spectrum with small wavelengths such as gamma rays, X-rays, and ultraviolet light. While the spectrum has a large wavelength such as radio waves.
As a wave, light has a frequency, and each spectrum has its own frequency. The spectrum with a small wavelength has a large frequency, whereas a spectrum with a large wavelength has a small frequency. The frequency value is directly proportional to the energy possessed by the spectrum.
3 Visible light
Visible light is the light we have seen so far, and the visible light spectrum is in the wavelength range of 380 nanometers to 750 nanometers. This visible light when diffracted will become various colors such as in the event of a rainbow.
The colors found in visible light are red, orange, yellow, green, blue, indigo, and purple. Red light has the largest wavelength in the visible light spectrum, so the frequency of red light is the smallest. While purple has the smallest wavelength, so it has the greatest frequency.
The description above is some interesting things about light from the point of view of science, especially physics. Light is one of the most important things in life on this earth, and learning about light is a form of gratitude for the blessings of light that God Almighty has given us.
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