What is a Refractor telescope?
A refracting telescope is a type of optical telescope, that magnifies objects from far away. It does this by refracting the light rays it collects to create an image that is inverted and thus magnified.
There are many different types of telescopes but most have the same parts to them. Refracting telescopes have two convex lenses:
The Objective lense - this lense has a greater diameter than the second lense as the greater the aperture, the more light it can collect and bring into focus at the focal point.
The Eye Lens - this is where the viewer can view the final image.
How does the telescope work?
Telescopes work by manipulating light waves and using properties of lenses
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The Eyepiece doesn't need a large aperture as it is not collecting any light. The larger diameter of the objective lense also means its focal length will be much longer than the smaller eye lense.
Behavior of light passing through different media
A medium is any region that allows waves to travel through them. The ease that the waves can travel through depends of the medium’s Index of refraction (Optical Density.)
A refractive index is a measure of the velocity light rays can travel in that medium, compared to a vacuum.
When light rays change mediums refraction occurs.This when light rays change speed as it is travelling from one medium to another that has a different refractive index to each other. Uninterrupted, light rays will travel in millions of straight lines, however if light travels through a medium that has a higher index of refraction, that lightwave will slow down and bend towards the normal. This will make the object look as if it were bent.However if the light wave travels through a medium that is less dense, it will speed up and bend away from the normal as it can now travel faster than
The distance between the target and first focal point (fs) of the standard lens were measured to give χ. The focimeter equation〖[F〗_t= F_(s^2 ) x] was used to work out the correct power of the lenses (Ft). A graph was plotted with Ft being the Y value (in dioptres) and χ being the X variable (in metres). Fs2 remained constant.
The laws of reflection and refraction can be shown using Huygens’ principle as well. The concept of diffraction occurs when a wave bends in a way other than reflection or refraction. Diffraction occurs to some degree in every shadow. The amount of diffraction depends on the wavelength and the size of the obstruction that casts
Unit D Summary: Light and Geometric Optics 10.1 : Light and The Electromagnetic Spectrum Chapter 10.1 covers light and the electromagnetic spectrum. This chapter starts off by describing how light is a form of energy that travels in waves. The properties of said waves include a crest (the highest point of the wave), the trough (the lowest point of the wave), and the rest position (the level of a wave without energy).
The answer lies within a phycological phenomena, Sigmund
Light absorption occurs when atoms or molecules take up the energy of a light and reduces the transmission of light. The absorbance will increase with an increase in concentration while the transmittance will decrease with an increase in
“No two persons read the same book ever” (Edmund Wilson). The way people comprehend books can vary from person to person. Some may be offended by it’s contents, but others may think it’s completely appropriate. The Marbury Lens by Andrew Smith, has had the same reaction. When Andrew Smith was writing this book, he was trying to get fired.
Focus the eyepieces to adjust your view. 3. Adjust the illumination to an appropriate level by adjusting the iris diaphragm and the condenser. The light should appear on the side directly below the objective lens, and give an even amount of illumination. 4.
The microscopes (most) use lenses to magnify the image of an object by focusing light or electrons. 2b. What does it mean if a micrograph
The origins of human skin colour: The origins of human skin colour remained an enigma that was to generate a multitude of misconceptions. The true source of human pigmentation was finally revealed with the discovery of the melanocyte in the 19th century. Once the amino acid tyrosine was identified to be the key enzyme in pigment formation, attention focused on elucidating the chemical structure of melanin, an enterprise that remains incomplete.
3Cs (Customer) The differentiation value of 1-D Acuvue is convenience and the comfort of the product and less medical complications and hence unscheduled visitors to the opticians. Taking into consideration the past experience of the patients using VCP, the most likely potential users of 1 Day Acutuve will be current disposable lens users, However, despite the high potential the trial launch in western states has proven that the majority of patients are so-called “part-time users”, those who use both type of vision correction products (VCP): spectacles and lenses, with the average use of contact lenses being 4.4 days a week. Therefore the the primary market segment for 1-D Acuvue should be the the part-time contact lens wearer (~4 million
1.1 Explain how observations are used: Reference- www.slideshare.net. Text book- Penny Tassoni. Laser learning.
DEFINITION OF MEDIA, PREJUDICE AND DISCRIMINATION. Media is the means of communication, as radio, television and internet are used to reach out people or influence them widely. Although it is not easy to define
The plano-convex lens is replaced with another glass plate and a section of optical fibre was placed between them at one end. Light falling normally on the plates will be reflected back out with a phase difference. Figure 3: Apparatus set up for finding the thickness of an optical fibre, showing the optical fibre between the two glass plates This is due to the fact that some of the coherent light waves were reflected from the top plate and others from the bottom, this path difference resulted in the interference of these waves with one another. This caused an interference pattern similar to the below image: Figure 4: Image similar to the observed interference pattern.
A broadcast or storage medium is utilizing electronic technology. They may include televisions, radios, the Internet, faxes, CD-ROMs, DVDs, and any other medium that requires power or digital information encoding. The term electronic medium is usually in contrast to a print medium. Impact of Media on society:
Sandra Assouad Ahmed Sokkary Farida El Hagin Omar El Battat Television and how it affects our society Television is one of the most important miracles of science. It is a telecommunication medium that is used for transmitting and receiving moving images and sound. Televisions can transmit images that are monochrome, in color, or in three dimensions. Whether good or bad, television has found its way into the lives of people all over the world and it 's an important part of life for many.