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Light is a form of radiant energy or energy that travels in waves. Since Greek times, scientists have debated the nature of light. Physicists now recognize that light sometimes behaves like waves and, at other times, like particles. When moving from place to place, light acts like a system of waves.
Explain that visible light only makes up a tiny portion of all the light/energy that is in the Universe and that the rest of the energy/light is visible. vi. Explain what a wavelength is, giving examples of short wavelength energy on the electromagnetic spectrum and examples of long wavelength energy on the electromagnetic spectrum.
Chapter 1 Basic Properties of Light. Light is described using 3 pictures - seemingly contradictory! Waves - Rays - Photons. A propagating “disturbance” in electric and magnetic field (simultaneously!) At a fixed point in space, the electric field oscillates in time. At a fixed point in time, we see a wave train frozen.
Oct 17, 2014 · Light is electromagnetic radiation that has properties of waves. The electromagnetic spectrum can be divided into several bands based on the wavelength. As we have discussed before, visible light represents a narrow group of wavelengths between about 380 nm and 730 nm. Our eyes interpret these wavelengths as different colors.
Visible Light: The only type of electromagnetic radiation that our eyes can de tect. It is used for fibre optic communications and photography. X-Rays: Used for medical imaging and security scanners.
Light is an electromagnetic wave. Visible light is the part of the electromagnetic spectrum with wavelength between about 400 nm (ultraviolet) and 700 nm (red). In this chapter we will study what happens when a ray of light strikes a surface or travels from one medium to another.
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Is light a wave or a particle?
Humans (and RGB cameras) have color sensors sensitive to three ranges. Observed light depends on: illumination intensities, surface orientation, material (albedo, specular component, diffuse component), etc. Every object is an indirect light source for every other.
