Long Sightedness
a. what causes the defect
This is normally inherited from your parent’s genes.
b. the symptoms displayed
The symptoms caused are excessive headaches, blinking and red, tearful eyes.
c. propose what sort of lens may be used to correct each vision.
Convex lenses are used to correct the vision.

Short Sightedness
a. what causes the defect
Like long sightedness (hyperopia) this is more likely to occur if it runs in yoru family.
b. the symptoms displayed
Close objects are blurry while ones from far distances aren’t.
c. propose what sort of lens may be used to correct each vision.
Concave lenses are used to correct this vision. This is because the concave lens enlargens the image therefore making it much more easier to see things close up.

Optical fibres are used in a tool called the endoscope. The endoscope contains many thin strands of optical fibres which are then placed inside the patient’s mouth and down to wherever the doctors need to locate and operate. Inside the optical fibres are miniature cameras which show up on a screen the endoscope is linked to. The optical fibres also illuminates the area in close proximity of the fibre , therefore making it much easier to know where to operate.

2. Identify the traditional medical techniques that optical fibres might replace.
Optical fibres can replace the traditional method of putting anaesthetics then cutting open the body or guessing where the infected area might be.

3. Evaluate the benefits of fibre optic technology to medicine.
Optical fibres will make the doctors work for operating the patient more faster and with more accuracy. The patient will feel less painful and not having a mark left somewhere in their body.

2. When the young universe inflated, it became extremely bigger.

3. If the matter and antimatter had fully destroyed all of each other, the building blocks of the universe would not have been formed.

4. Particles called quarks began to form the protons and neutrons when clumped in groups of three.

5. a) The proportion of hydrogen is around 77%.

b) The reason that hydrogen is the most common element is because it can be formed easily with one proton nucleus, therefore being the simplest element in the universe.

6. A proton is in the centre of a hydrogen atom.

7. The early universe was opaque because it contained energy in the form of radiation.

8. The fog cleared as the expansion of the universe continued. This is due to the fact that more and more particles joined together and formed new elements.

9. They detected the big bang because of the radio waves that they detected. They would that no change was made and were similar in all directions. They realised that the signal was the afterglow of the big bang.

10. COBO is an acronym that stands for Cosmic Background Explorer, which is a satellite.

11. Galaxies and stars are formed when clouds of gases are compacted.

12. Baby planets become bigger when more matter is attracted.

13. There are four main theories that outline the future of our universe. They are:

• Open universe
• Closed universe
• Flat universe
• Accelerating universe

14. I believe that the ‘Accelerating universe theory’ will represent our future. This is due to the fact that recent observations and research suggest that this would most likely happen.