tony haouchab

1. Analyse why red sunsets can sometimes be more impressive when there is more dust or pollution in the air than usual?

The sun looks more impressive when there is dust or pollution when for example when there is a bush fire, the smoke can show the suns colour to red, so that when it sunsets, it creates a very read colour to the earth which looks very good.

1. Describe what happens inside water droplets to cause a rainbow and explain how you can tell whether a rainbow is a primary or secondary.

When it is raining, it could rain when it is not cloudy and the sun, while it is raining, the sun reflects with the water droplets and that creates colours and then causes a shadow of curved different colours to make a rainbow. The colours in the rainbow are showing both primary and secondary to make wonderful colours but it does not show black and white.

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

Find the following information:

1. what causes the defect –

Short sightedness – when you are not able to see close up, this could be caused by being close up to the TV, computer etc.

Long sightedness – when you are not able to see at a long distance and could also have trouble with close up.

1. the symptoms displayed

Long sightedness – objects look very fuzzy and blurry, you get headaches and tired eyes, and you start to squint.

Short sightedness – object appear blurry and unfocused.

1. Propose what sort of lens may be used to correct each vision.

For short sightedness, glasses with lenses that are not as thick, thin just for close up. And for long sightedness, they will need thick lenses so they are able to see in a further distance and possibly for a close up.

Fibre optic technology offers many advantages when used in medical applications.

a.     describe how optical fibre may be used in medical applications:

To check the digestive system al around the inside of the body, instead of cutting up the body and making any risk of danger and not wasting time

b.     identify the traditional medical techniques that optical fibres might replace:

Surgery, operation, which means that they open up the body by cutting and making scars just to see inside the body and you don’t find where the area is so u cut up an area which is perfectly fine.

 c . Evaluate the benefits of fibre optic technology to medicine 

Research more about the Hubble Space Telescope. Gather information about

a) Hubble’s involvement in space research? Edwin Hubble’s involvement in space research was the fact that he was an astronomer who studied all galaxies except the Milky Way.

b) What the space telescope does? it is a research tool for astronomy which Edwin Hubble invented.

c) Where it is? On the Earth’s orbit.

d) What Hubble’s constant is? Hubble’s constant is the value of h