• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Identification of purpose of physics.

Extracts from this document...

Introduction

Greenwich Royal Observatory Identification of purpose of physics From my visit to the Greenwich Royal Observatory, the first aspect of physics that I will be showing an understanding for is the time keeping due to the earth's movements. Time keeping is on of the most important and what make Greenwich the most famous place for the "creation" of measuring time efficiently. Everyone needs the time and that's why so many years were put into inventing the "perfect" clock. The physics behind the clock is to get an exact measurement of 1 second. This has been achieved by pendulums, weights and now by computer. Time has been completely based on the earth's movement. Early on time was just measured by the light of day but then this all changed due to the stars. In the 1700's people started to measure the earths spin by using the starts. At night the looked up and pinpointed a star. The following nigh they would wait for that start to appear in the same place. The time between this was 24 hours. ...read more.

Middle

[fig 2.1]. However the draw back it that the level of detail decreases when the hole size increases. [fig 2.2]. So with a smaller pinhole although the light intensity is lower the detail level is much higher. [fig 2.3]. [fig 2.1] As you can see if the pinhole is reduced in size there will be less light able to pass through the pinhole. [fig2.2] As this is the larger pinhole it is easy to see that there is a larger volume of light passing through. However because of the size there is a much larger degree of blurring. This is because the light waves passing through the pinhole have many routes to take, therefore as we see an object the edges look more blurred than usual. This is because the light reflected from the object could take many routes through the pinhole and onto the background. This means that each individual point of the image will have a large "blurring area". [fig 2.3] This is the smaller pinhole and the first thing observed is that there is much less light passing through the pinhole. ...read more.

Conclusion

No one has not been in a picture or seen a photo making them a very good source of data for almost any situation from the family photo book to evidence in court. With the progression of the "pinhole" since 1873 this has led on to capturing images with time (motion pictures and film). All these have only been made possible due to the discovery of the pinhole, and no one can dispute the fact that they have not been affected by the television (where all the programmes have arisen from the pinhole), which plays a larger part in our lives than ever before due to the speed of up to date news, entertainment and viewing. Economically the pinhole has led to massive income to a whole range of people from Celebs to People in Power to Gardener's etc... Ethically the pinhole has led to a "less private life" as the latest highly technical camera and recording equipment, when used by professionals, can be very invasive and damaging to an individual's life. An example of a pinhole camera is the Camera Obscurer in the Greenwich museum which revolves around London and displays an image on a table in a dark room. Sven Jaworski ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Microscopes & Lenses section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Microscopes & Lenses essays

  1. In this experiment I will be investigating the efficiency of a motor. I hope ...

    and image distance (v) until there is no longer a real image, increasing the length by 0.5 - 2.0 cm each time * Record my results in a table, It should be clear and informative, it should state any units * Plot my results onto a graph * The table

  2. My experiments focus is to obtain an accurate measurement for a specific lenss power.

    insinuates that it is generally less reliable for measurements. Based on this I will revert back to using the filament lamp as my light source in hope of achieving more reliable results. In combination with the 25mm gap between each U distance method, I believe I will achieve more accurate results.

  1. Use of the material Zerodur in the KECK observatory telescope. The very low CTE ...

    When by itself, the CTE of a material carries little value; hence it is easier to compare the CTE of ZERODUR(r) to other known materials in order to get a feel for just how appropriate it is for the usage in telescopes. Some known values of CTE are shown below.

  2. Relationship Between U and V For a Convex Lens

    The other thin lens (yellow) would have given a much larger distance of results, due to having a much bigger focal length. Red produced clearer and easy to measure distances. Lastly, choosing the other lens would have meant that other v distances are hard to measure.

  1. Bradford Museum of Film and Photography

    A pinhole camera can also be used to create photographic images. If light sensitive film is left in the camera and the camera left focusing on one image then after a while a black and white image will develop itself on to the film.

  2. aspects of physics

    The above diagram shows a light beam coming from lights set in the floor travelling upwards and reflecting at a 90� angle to another reflecting surface, and then it does another reflection at 90� down to the pool. The above diagram shows a light ray reflecting and how it does

  1. Does the focal length of a lens depend on the colour of light used?

    the same procedure using the blue filter Data treatment Once I have the results for the object and image distances the first thing I will do is find the average image distance for each object distance in both of the filters.

  2. Observatory Visit

    This sort of line appears brighter compared to the region of the spectrum around it. Absorption lines cause dark features in the continuum emission where the radiation is removed. This is caused by atoms (or molecules) absorbing radiation, and moving to a higher energy state.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work