Introduction to light: Electromagnetic radiation is a form of light energy. Electromagnetic is made up from visible light, invisible light (ultraviolet, infrared, X-rays, radio waves and microwaves). In vacuum lights maximum velocity is 3.0x10^8 m/s.
Reflection: If an object does not radiate its own light, it must reflect light to be visible. Reflection includes two beams - an approaching or incident beam and an active or reflected beam. The imaginary line that is perpendicular to the principal axis is called the normal. A beam of light that hits this surface is known as the incident beam/ray. This beam/ray of light hits the surface and ricochets off (reflected beam). The point between the incident beam/ray and the normal will be indistinguishable in estimation as the edge between the reflected beam and the normal. All reflected light complies with this relationship, called Snell's Law, that the incident angle breaks even with the angle of reflection. This is the Law of
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Light going through air and after that experiencing water is a case of a light beam changing medium. The speed of the light beam changes when it enters an alternate medium. As a rule the heading of light likewise changes. We say the light twists. when light travels in a vacuum it is at its peak speed 3.0x10^8 m/s. Contingent upon the new medium the light will travel quicker or slower. It is the distinctive densities that makes the decrease in velocity which at that point makes it twist. Light beams slow down around 25% when going through water and 35% when going through glass. On the off chance the light voyages slower then this medium is known as the denser medium. In the event that the light beam ventures faster then the medium is known as the rarer medium. At the point when light enters a more optically dense medium the beam twists towards the normal. c=3.0x10^8 m/s V = fλ λ = wavelength These diagrams use snell’s
This reflective essay will demonstrate the concept of reflection. The model of reflection by Driscoll, 2007 has been followed in this essay to reflect the clinical skills that I have studied and practiced in week 7to week 9 of this unit which assisted me to get prepared for the practical experience which I will commence at the end of this semester. I have practiced numerous skills during the practicals class, but this essay will be a focus on taking care of bedsore and wound management.
Now the description of light is harder concept to grasp. We describe light by using wavelength and frequency. Wavelength would be the distance between two corresponding points on a wave. Frequency would be the number of waves that passes a point per second. For example the wavelengths of visible light such as red would be visible at seven hundred nanometers. Another example on how we describe light is to take the color green, for it to be visible it would have a wavelength of five hundred nanometers and a frequency of 6 x 10 14/s. Light can also be described on our scale as both waves and particles or packets of light called photons. The energy of a photon is proportional to the frequency. The last way we can describe light is to use the Atomic Spectra. The atomic spectra give only specific colors in a line spectrum, where each line is a specific wavelength of light. For example colored light, such as light from a neon sign would work perfectly with the atomic spectra.
Light is both part particle and part wave. Light is “the electromagnetic radiation that may be perceived by the human eye”. It consists of photons, which are massless bundles of concentrated electromagnetic energy. Light’s lower frequency is red, and the higher frequency is blue. Like sound, light has frequencies humans can’t detect. Ultraviolet light is at a frequency higher than violet, and infrared is at the frequency lower than the red of visible light. We get UV (ultraviolet) rays from the sun, and infrared is used in night vision to see better.
All electromagnetic waves are transverse and can all travel through a vacuum. They also require no medium. The sun produces all electromagnetic waves, they are produced by a vibrating electric charge, meaning that they consist of both an electric and magnetic component. All electromagnetic waves travel at the speed of light and in a straight line unless there is a change in the medium. If there is a change then the ...
X-rays and gamma ray photons are part of the electromagnetic spectrum. The twin nature of electromagnetic radiation is used to justify the wave and its behavior. A photon is a bundle of energy that can be identified by the equation E = hv. Where h is the planks constant and v is the frequency. The frequency is equal to the speed of light 3x10 8 divided by the wavelength. Therefore, high-energy radiations have a short wavelength and a high frequency.
Electromagnetic waves are factors of wavelength, frequency and speed of electromagnetic wave propagation or the relationship between rapid propagation of vapors that can propagate in a vacuum by multiplying the wavelength and its frequency. Equation of Electromagnetic Waves The equation is:
Refraction occurs when light travels from one medium crosses a boundary and enters another medium of different properties. For example, light traveling from air to water. The amount of refraction (or bending) can be calculated using Snell's Law.
Spherical aberration is the blurred image of an object due to parallel light rays passing through t...
Spectrum refers to the electromagnetic spectrum, which is the range of frequencies through which electromagnetic radiation travels. Electromagnetic radiation is the energy that travels at the speed of light in waves as a stream of photon particles. This form of energy encompasses radio waves, microwaves, visible, nonvisible light, X–rays and gamma rays, and these classifications are based upon the frequency at which the energy travels (see figure 1). In order to refer to a specific portion, also called a band, of the electromagnetic spectrum, one uses Hertz (Hz) as the unit of measurement.
Electromagnetic energy can be explained by treating the spread of energy over a range of wavelengths. The radiation can be measured by finding the energy falling per second that is Watts per square meter for each band of 1 micrometer wavelength.
Nature of wave: It is an electromagnetic wave as it does not necessarily require a medium for p...
This radiation travels through space at the speed of light in the form of waves of electric and magnetic fields. Because of its basic similarity, all such radiation can be focused by reflecting it off a curved surface or by refracting, or bending, it with glass lenses. The devices that are used to do this, however, vary, depending on the wavelength or type of radiation being studied.
Definitions: Angle of incidence: The angle made between an incident ray and the normal to the surface that it strikes. Angle of refraction: The angle made between the reflected ray and the normal to the surface that it strikes. Medium: The substance carrying a mechanical wave. Refraction: The bending of the direction of travel of light as it
When a ray of light is bounced or reflected off of a plane surface, there is a specific law that can be used to predict the angle at which it is reflected off of the surface. This is known as the ‘Law of Reflection’ and it states:
Electromagnetic radiation is energy that flows through free space. Electromagnetic radiation comes in a list of energies known as the electromagnetic spectrum. Electromagnetic spectrum is the complete range of the different wavelength of electromagnetic radiation. It consists of light, radio waves, visible light, infrared waves, ultraviolet light, x-rays, microwaves and gamma rays.