Nate #34

Likes/dislikes of this project…any suggestions on how to improve???

Overall I believe that this project had been a fun experience for that we had don a several amount of practical involving lenses and mirrors. I had most especially like the splitting of the white light into rainbow colours prac for that it had turned out to be an amazing result. I don’t believe there had been any dislikes of the project but just to have the folders to be plastic sleeve folders because it is a hassle having all the sheets falling out of the cardboard folder.

What areas do you think you have improved in from project 1 to 4?

I believe that I have found an improvement in my prac report writing skills I believe that I am able to create a well written report on many kinds of practicals and to me that is a huge improvement.

What further skills would you like to develop over the next few projects?

Some skills that I would like to develop over the next science projects is to improve on my time management and my neatness, for that at times I believe I can be well more punctual to my classmates and teachers.

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

Blue skies and red sunsets are not caused by refraction, but by another phenomenon known as scattering. Scattering is molecules of gas and dust particles in the atmosphere which alters the direction of light rays. Blue rays tend to scatter more than other colours of the spectrum. Blue light against the dark background of space causes the sky to appear blue. At sunrise and sunset, when sunlight travels further through the atmosphere, almost all of the blue rays are scattered and the light that reaches us is mainly red or orange.

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

Small droplets of water behave like tiny prisms in the sky. Sometimes the colours will reach our eyes after refracting and undergoing total internal reflection. A primary rainbow is a band in the sky with red at the top and blue at the bottom. Secondary colours include of cyan, magenta and yellow.

Reference;
Taken from Science Focus 3 text book pages 110-111

Short and Long sightedness,

What Causes the defect?

The cause of short sightedness is by certain diseases or drugs and it can also be the first sign of type 2 diabetes.

The cause of long sightedness is through your family, it has been identified as a gene. It is said that many children are born with long sightedness as it resolves itself as they grow older and their eyes develop.

The symptoms displayed?

The symptoms for short sightedness are that they would not be able to see objects or things from far for that it would appear blurry or out of place.

The symptoms for long sightedness are that a person is unable to see or read something close by such as book or computer screen. It is said that if parents suffer from long sightedness, there is a chance that the child he may have might also have too.

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

Short sightedness is corrected by wearing spectacles with concave lenses.

Long sightedness is corrected by wearing spectacles with convex lenses.

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

Describe how optical fibre may be used in medical applications

Fiber-optic communications is based on the fact that light within a glass medium can carry more information over longer distances than electrical signals can carry in a copper or coaxial medium.

Identify the traditional medical techniques that optical fibres might replace.

Optical fibres will replace the use of copper wire for that they are thinner, cheaper and more durable than copper wire. They also can transmit more information.

Evaluate the benefits of fibre optic technology to medicine

Fibre optics will help doctors because if there was an untreatable tumour may be destroyed by a laser light sent down an optic fibre cable.