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The Importance Of Light

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What is light?
Light is the smallest quantity of energy, a photon, that can be transported. It cannot be split, only created or destroyed. When talking about light, it means visible light that is a small part of the electromagnetic spectrum.
The Electromagnetic Spectrum in accordance to light:
The electromagnetic spectrum (EMS) refers to the radiation that is released from unstable atoms. The EMS goes from radio waves to gamma rays. Electromagnetic radiation travels in waves, the frequency of a wave is the amount of waves per second, while the wavelength is the length of an individual wave in meters. Visible light is a very small part of the EMS, from left to right, violet wavelengths has the highest frequency and shortest wavelength, while …show more content…
The effect on light rays passing through lenses:
What is a lense?
A lens is a piece of glass or plastic, when light passes through a lens the light refracts (changes direction). A lens makes light look like it is is coming from somewhere other than the origin of the light, it makes objects look either smaller or larger. There are two types of lense, a converging lens (convex) and a diverging lens (concave).
When parallel light passes through a concave lense, the light diverges-it curves outwards, while when parallel light passes through a convex lense, the light converges-it bends inward and meets at the focal …show more content…
When light waves travel through air, they travel fast, as air is less optically dense, but when light travels into a different medium (for example, a lense) it is relatively slow as the lens is more optically dense. On a converging lense, any incident ray that travels parallel to the principal axis (figure 1) will refract through the lens and will converge at the focal point on the other side. Whereas when an incident ray that travels through the focal point towards the lens (figure 2), will refract through the lens and will travel parallel to the principal

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