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

Observatory Visit

Extracts from this document...


Ben Parsons    Y-Block         Norman Lockyer Observatory Visit

Norman Lockyer Observatory Visit


The Norman Lockyer Observatory, based outside Sidmouth South Devon, is an historic working optical observatory and an educational centre for science, mainly concentrating in the fields of astronomy, meteorology, amateur radio and sciences of the coast and countryside. It is operated by The Norman Lockyer Observatory Society, a registered charity, and is staffed entirely by unpaid volunteers, many of whom are retired scientists. The Observatory was established in 1912 by Sir Joseph Norman Lockyer to continue his astronomical research when the South Kensington Observatory was closed.  Now it provides a facility at which the general public and eccentrics alike may participate in projects and pursue recreational study of science in a practical way. The Hill Observatory was intended to continue research into the Sun’s effect on the Earth’s climate, and the spectral classification of stars. By 1913 solar research had commenced using the Kensington 10-inch twin tube refractor which had been brought from South Kensington.

...read more.


Refracting Telescopes use a lens to gather light and bring the image to the eyepiece. These are the type of instruments that most people think of when they think of a telescope. They are fairly maintenance free and generally provide superb images of the moon, planets, star clusters and general sky gazing. They tend to be smaller in aperture than other types so they are not as good for viewing fainter sky objects such as galaxies and nebulae.image02.jpgimage03.jpg

The refractor telescope uses a lens to gather and focus light. The first telescopes built were refractors. Most small telescopes sold in gift shops are refractors.


  1. Refractor telescopes are rugged. After the initial alignment, their optical system is more resistant to misalignment than the reflector telescopes.
  2. The glass surface inside the tube is sealed from the atmosphere so it rarely needs cleaning.
  3. Since the
...read more.


2. How well the light passes through the lens varies with the wavelength of the light. Ultraviolet light does not pass through the lens at all.

3. How well the light passes through decreases as the thickness of the lens increases.

4. It is difficult to make a glass lens with no imperfections inside the lens and with a perfect curvature on both sides of the lens.

5. The objective lens can be supported only at the ends. The glass lens will sag under its own weight.

Other uses for refractive telescopes are for some types of binoculars and telescopic rifle sights are the most common uses than telescopes for star-gazing.





Staff at Norman Lockyer Observatory

Pictures: Kensington Telescope and its dome are my own.

Birds eye photo of Observatory from   http://www.projects.ex.ac.uk/nlo/welcome.htm

 Graph Image from http://www.astro.washington.edu/labs/clearinghouse/labs/Spectclass/images/blackbody.jpg

...read more.

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. Norman Lockyer observatory trip

    Reflectors have large light gathering capacities, and can produce bright images of faint, deep-sky objects for visual observing as well as astrophotography. One disadvantage of reflectors is that you occasionally have to clean and align the mirrors. Also, slight errors in grinding the mirrors can distort the image.

  2. Telescopes - research into types and properties of telescopes

    are bent less than the shorter wavelength light (blue colours) as they pass through the lens). There are a couple of ways to reduce chromatic aberration. One is to use multiple lenses to counteract this effect. The second uses a long focal length to minimise it.

  1. Refracting telescope.

    Suppose a ray of light is incident upon medium 2 from medium 1 at angle relative to the normal to the interface between the media. Then the angle that the transmitted ray makes to the normal is given by the following equation: This is Snell's law.

  2. The eye.

    Ganglion cells. There are about 1 million ganglion cells and there axons travel over the surface of the retina towards the blind spot (this area contains no photosensitive pigments) where they pass, through forming the optic nerve which carries information to the brain.

  1. Investigation of the chromatic aberration of a converging lens.

    The object grill was placed in front of the light bulb in order to give a clear image. 4.The lens and screen were positioned against the metre rule in a straight line with the object grill so that all their positions can be measured.

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

    61 D. This results in an average of 6.555+/- 0.055 D. This uncertainty is larger than the first experiment (0.02D); yet smaller than the second (0.125D). Percentage wise it is also larger than the first experiment and smaller than the second: (0.0555/6.555)x100= 0.839% in comparison to 0.309% and 1.94% respectively.

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

    This picture shows a segment of the mirror before it is coated in the reflective aluminium. This photo gives an idea of the scale of the pieces of the mirror.9 Several properties of ZERODUR(r) make it perfect for use in telescopes; - Very low coefficient of thermal expansion (CTE)

  2. Given a Tube Containing a Lens, Calculate The Focal Length of The Lens and ...

    0.0295 = 0.112m a = focal length - y-intercept = 0.112 - 0.0450 = 0.0670m Shallowest: f = dy / dx = 0.325 / 0.0315 = 0.103m a = focal length - y-intercept = 0.103 - 0.0650 = 0.0380m Error of focal length = (f-max - f-min)

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