Charbel Lattouf

Investigate the two types of sight defect- long-sightedness and short sightedness.

Find the following information:

long-sightedness can also be known as hyperopia. Hyperopia  is the inability to see near objects as clearly as distant objects, and the need for accommodation to see distant objects clearly. The symptoms of this are

1. Blurred vision

2. Difficulty seeing objects up close

3. Crossing of the eyes in children

Hyperopia is commonly treated using corrective lenses, such as eyeglasses or contact lenses.

Short sightedness or Myopia is the inability to see distant objects as clearly as near objects.The symptoms of this are:

1. Blurred vision

2. Difficulty seeing distant objects

3. Sits close to computer or TV

4.  Hold things close to the face

1. describe how optical fibre may be used in medical applications

Optical fibres have been used in many medical applications. To be more precise and accurate, they are used in medical imaging such as in bronchoscopes, endoscopes and laparoscopes. This helps better look at the body.

 identify the traditional medical techniques that optical fibres might replace

Traditionally they insert a pill with a camera to examine the interior of the body. so the optical fiberes can replace many things

 Evaluate the benefits of fibre optic technology to medicine

The benefits to medicine are that you can identify the disease or cure more accurately and get more information on the specimen. If this works well it can lead to the making of new medicines to cure diseases.

Investigate how Jocelyn Bell Burnell discovered pulsars in 1967. Write a short account of this event. (5 lines)

Bell’s first two years at Cambridge were spent assisting in the construction of an 81.5-megahertz radio telescope that was to be used to track quasars. The telescope went into operation in 1967. It was Jocelyn Bell’s job to operate the telescope and to analyse over 120 meters of chart paper produced by the telescope every four days. After several weeks of analysis, Bell noticed some unusual markings on the chart paper. These markings were made by a radio source too fast and regular to be a quasar. Although the source’s signal took up only about 2.5 centimetres of the 121.8 meters of chart paper, Jocelyn Bell recognized its importance. She had detected the first evidence of a pulsar.

NASA would undertake a mission like this so they can uncover clues to the geological history biological potential of Mars. They are trying to determine:

- Whether life ever arose on Mars

- Characterise the climate of Mars

- Characterise the geology of Mars.

I think that NASA will find, water, trapped oxygen, cells and samples of life.

I think that it is a good idea to research other planets because it is a back up if something goes wrong with out planet that makes it unlivable. Such things could include, global warming and if the sun increases it size and engulfs the earth.

These are 2  helpful websites that i think are very good and gave me some of my information>>> http://www.jpl.nasa.gov/news/phoenix/missions.php

http://www.jpl.nasa.gov/news/phoenix/mission-objectives.php

 THE BIG BANG:

What contribution did the following scientists make towards the big bang theory?

• Walter Adams. -  Walter Adams discovered how to determine stellar distances: they showed that the relative intensities of spectral lines could be used to determine absolute magnitudes of both giant and main sequence stars.

• Ralph Alpher. -  He was a  physicist whose doctoral dissertation provided a feasible formula for the scientific idea of the big bang.

• Robert Dicke. -  Used physical and mathematical formulas to estimate the age of the universe.

THE HUBBLE SPACE TELESCOPE

Research and gather information from the Internet about the Hubble Space Telescope. Use the following questions as the basis for your journal entry:

• What was Hubble’s involvement in space research? -  Edwin Hubble discovered these things related to space, the universe goes beyond the milky way galaxy, redshift increases with distance, also he discovered an asteroid.

• What does the telescope do? – The Hubble is the only telescope ever designed to be serviced in space by astronauts. It allows it to take extremely sharp images with almost no background light.

• Where can the telescope be found? – The Hubble Space Telescope is a space telescope that was carried into orbit by a space shuttle  in April 1990.

• What is Hubble’s law? – Hubble’s law is that the further the galaxies are from earth the faster they must be going.