and sunset rays are a rare phenomenon which occurs when shafts of sunlight shine through gaps in crater walls and mountains to cast a spike of light across a dark crater floor. They happen infrequently and only during sunrise and sunset when there is a very low angle of sunlight. The rays can range from thin slivers of light to triangular patches of illumination. They differ from lunar rays where debris from impact craters is strewn across the face of the Moon. A true lunar light ray has been defined
order to magnify images. Light travels in a wave with differing speeds. A medium (or media) is any one type of transparent matter e.g. Air, Glass, Water or a lack of matter (A vacuum) . The optical density of a medium is the amount that it slows light down when light is passing through it .This means light travels at different speeds in different mediums Because of this the light wave will refract (bend) when it passes from one medium to another. Not all of the light rays will undergo reflection
collect and refract parallel rays of light from distant objects in a specific way to produce a image that fits the size of our eyes pupil. The light rays are gathered through the opening of the telescope called the aperture, they then travel through the objective lens and refract onto a single point called the focal point. From here the light rays continue to travel in the same direction until they reach the eyepiece lens, which refracts the light back into parallel rays. Distant objects appear brighter
REFLECTION When a light ray strikes a plane mirror it changes its direction which is known as “reflection”. The light ray, which strikes the mirror, is known as “incident ray” and the ray after reflection is known as “reflected ray”. The perpendicular line which bisects the incident ray and reflected ray is called normal drawn to the point of intersection. The incident ray, reflected and the normal drawn to the point of intersection lie on the same plane. (Fig 1) When the light reflects in plane
the powerful rays of the sun. The suns beams are Radiant energy when it hits Earth. Energy comes in different forms such as: heat and sound. When you see things it is reflected of your eyes. Light affects how we see things around us. Thomas Edison designed the first-long lasting incandescent light bulb in 1879. Light travels in waves and is emitted from a source. The sun gives of Visible and Ultraviolet light. Light waves have peaks
What is light ray? In physic, a light ray or a ray of light is a narrow beam of parallel light which can be drawn as a single line a diagram. ( Referencecom, 2016) Rays are produced when light shines through a small hole which we called a point of source of light. The theory that light travels in straight lines led to the development of the light ray concept. Picture depicting light rays a. What is a light beam? A light beam is a collection of parallel rays radiated from the sun or other
off different types of UV rays that help a plant prosper. These UV rays can be either beneficial or harmful to plants. The intensity of these rays are dependent on 6 different elements: geography, altitude, time of year, time of day, weather conditions, and reflection. These components contribute to the amount of UV rays that are being absorbed by the plants. These factors vary how well a plant can grow while artificial light sources give a more controlled set of UV rays that are being transmitted
Optics and how they are applied in Optical Instruments. The key concepts are: a. Lights as a form of electromagnetic radiation Electromagnetic radiation is a term used to describe a pair of electric and magnetic fields that promulgate together at the speed of light. This means that light holds electric and magnetic components. The accelerated movement of electric charges emits radiation. This radiation is visible to us as light. Figure 1: electromagnetic waves Time-varying electric fields can bring magnetic
adult eye is about 25 mm in diameter. As light enters our eye, it is refracted first through the cornea which does about 80% of the refracting. The crystalline lens which is located after the aqueous humour (just under the cornea) approximately contributes the rest. Muscles around the crystyalline lens will contract or expand to adjust to the light rays entering so as to focus them onto the retina, just located at the back of the eye (assuming paraxial light rays). This adjusting process is called accomodation
the key concepts of light, reflection and refraction will be covered first. Light is defined as electromagnetic radiation of any wavelength. Light is also known as luminous energy or radiant energy. The speed of light is 299 792 458 m/s and is always constant. Electromagnetic radiation involves electromagnetic waves, radio waves, infrared, visible light, ultraviolet, x-ray and gamma ray. Electromagnetic radiation
Light Manipulation using telescopes AS91169 (begin writing below the heading) Light always goes in a straight line, however can change direction through reflection and refraction. Reflection occurs when a ray of light bounces off an object for example, a mirror. Refraction is where rays of light can go through a media and change direction for an example a lense or glass or the ozone layer. When light rays go through a median such as glass, some light refracts and some light reflects. As the rays
Introduction: Key Concepts: Light as a form of electromagnetic radiation: Light can be classified as a form of electromagnetic radiation, which includes visible light. The ‘light’ commonly referred to in everyday life belongs in this category. The electromagnetic spectrum includes other types of radiation such as gamma rays, radio waves and cosmic rays, all of which possess distinct wavelengths, frequencies and energy levels. These forms of electromagnetic radiation are not visible to the human eye
The Light and Electromagnetic Spectrum both fall in the same category. in order to see the light or notice anything about the electromagnetic spectrum. both of this we use everyday and see everyday and we also feel everybody day without it we wouldn 't have many thing we would have to day. Electromagnetic spectrum is a list of the most possible range of electromagnetic radiation around us. their many different electromagnetic radiation in the world. for example we got radio radiation, sun 's radiation
happens to light when it passes from one medium to another. For example, things appear differently from the bottom of a swimming pool than on the top. Simplistically, refraction is the bending of light. The explanation for this phenomenon, however, can be described with light as rays and light as waves. No matter the case, it is important to remember that the speed of light is constant in every homogeneous medium, regardless of shape, size or form. The index of refraction Light travels ( in
Refraction of Light Aim: To find a relationship between the angles of incidence and the angles of refraction by obtaining a set of readings for the angles of incidence and refraction as a light ray passes from air into perspex. Introduction: Refraction is the bending of a wave when it enters a medium where it's speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media
medical x- rays, x-ray waves, how x-rays and visible light are different and the same, how you use x-rays and what are the ethical issues of an x-ray. Willhelm Conard Roentgen was the one who discovered x-rays in 1995. He knew that the new ray succeeded in forcing a way through most substance like the human tissues, but he did not know what the exact nature of ray is, which is the reason why he named the object X- (means unknown) ray. Medical x-rays are used to diagnose and treat diseases. X- rays are
one used by Galileo consisted of the glass lenses mounted in a tube (Jenny, et al. 12). Further, Newton discovered that when light passed through a lens, the different colors were refracted by differing amounts. In solving this problem of the chromatic aberration, Newton designed a telescope that used mirrors, rather than lenses, to bring the light to a focus. Further, the light from the object being viewed is collected by the concave primary mirror and reflected a smaller secondary plane mirror. Furthermore
antenna) conducts alternating current, electromagnetic radiation is propagated at the same frequency as the electric current. Depending on the situation, electromagnetic waves can be waves or like particles. As a wave, characterized by speed (speed of light), wavelength, and frequency. When considered as particles, they are known as photons, and each has an energy associated with the frequency of the waveform shown by the Planck relationship E = Hν, where E is the photon energy, h is the Planck constant
Light: the quantum phenomenon that provides luminous energy for our world. Radiant energy is why we can observe a twinkling star in the night sky, perceive colors from a painting, distinguish daytime and nighttime, and witness life itself. However, the concept of light is difficult to digest. Many questions about it are yet to be pondered, and most existing ones require technology beyond your and my reach to answer. But we can prove something without much modern tools: manipulation of light. Manipulation
After his growing interest with light bending, he applied his knowledge of the reflecting and refracting properties of light and invented the first reflective telescopes. Newton's reflective telescopes vastly improve the clarity of images as well as escaping from chromatic abberration. In order to fully understand the concepts and ideas of how a telescopes work, some knowledge of simple optics are required. Some Simple Optics Refraction Refraction occurs when light travels from one medium crosses