alex benn’s blog

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

Find the following information:

1. what causes the defect
2. the symptoms displayed
3. propose what sort of lens may be used to correct each vision.

A1. For short-sightedness, the cause is usually because it runs in the family. It can also be an early symptom to show that someone may have type 2 diabetes. The scientific term for Short sightedness Is Myopia. The cause of this is that the light your eye takes in, has its focal point BEFORE the retina which gives a blurred image.

B1. The symptoms are that distant objects appear blurred while ones from short distance are still in focus.

C1. The type of lens that might be used to treat this is A concave lens because it gives a magnified view of a wide area. You can also get Laser eye surgery which is becoming increasingly popular.

A2. Long sightedness is also a condition that can be passed down from genes. Many babies are born with Hyperopia but it corrects itself as they get older.

B2. the symptom is that people cannot see things from a short distance because it is out of focus. This is why people need reading glasses.

C2. The lens that you may need to correct long sightedness is a convex lens because it creates a short focal point. You can also correct it with laser eye surgery

1. Likes and dislikes of this project…..any suggestions on how to improve???

1. During this project I have actually enjoyed finding out how binoculars, telescopes, periscopes and other optical instruments work. They are alot simpler than I thought. I also liked making my own periscope out of 2 mirrors and a milk carton. What I didn’t like was being sick which meant I missed out on 3 days of school and had no idea when I came back.

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

2. I think I have improved on my ability to divide work and understand that some people’s maximum amount of work in a lesson might be less than mine. I have also been able to let others take the main part in presentation when I used to always want to do everything. 

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

3. I would like to develop the skill of catching up on work and trusting others.

1. Analyse why red sunsets can sometimes be more impressive when there is more dust or pollution in the air than usual.  When there is more dust or pollution in the air, red sunsets can be more impressive because when the red light in the atmosphere spreads and gets hit by light particles, there are more particles in the air which means that the light travelling from one particle to the other has a smaller distance between particles which means a stronger colour is retained

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 rains, the light refracts inside the water  droplets which makes the spectrum of light appear (rainbow).

Secondary rainbows are very rare and are when a second rainbow occurs in the sky. You can tell the difference because on a secondary rainbow the colours are backwards with Violet on the outside and red on the inside.

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

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

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

c.     Evaluate the benefits of fibre optic technology to medicine 

a. Optical fibres are a great new breakthrough in medicine and telecommunication technology. In medicine, Fibre optics are helpful because they are lightweight, flexible, strong and easy to manouver inside the body which is important when navigating the anatomy of a person.

b. The traditional medical techniques that fibre optics get rid of are huge holes in people during surgical procedures to find what is wrong with them. Fibe optics can be joined together and be connected to a lense which sends images of inside the person through a small cut in the person.

c. The benefits of fibre optics to medicine are great. Firstly the Size of them enables less invasive procedures to be carried out which get the sought out information quicker. They are also cheap to make which means medical bills and costs are lowered for people who undergo surgery with them.

1 What did you like about the wikispace project? explain

2. What did you NOT like about the wikispace project? explain

3. What did you find hard about working in groups?

4. How did the wikispace keep everyone in your team accountable

5. How could you improve your presentation?

1. In my project, I liked the fact that wikispace had a history. It meant that it was obvious that Zac did absolutely no work.

2. Even though there was a history tab, I didn’t like a particular persons work ethic. I was also a bit touchy with the other ones, because all he did was copy and paste.

3. When we were working in groups, I found it hard that I was the only one doing good standard work.

4. It kept everyone accountable because it was very obvious with who did do work, and who was lazy and unco-operative.

5. I think I knew my topic well but my other group members did absolutely no research for themselves and had no idea about what they were talking about.

-         What was Hubble’s involvement in space research?

-         What does the telescope do?

-         Where can the telescope be found?

What is Hubble’s law? 

1. Hubble’s involvement in space research was creating a telescope and creating his own law on space.

2. The telescope is mainly used to see visible light and near-ultraviolet light in space.

3. You can find the telescope aboard the space shuttle “discovery”, it is outside the Earth’s atmosphere which allows it to take super sharp pictures without having background light.

Hubble’s law is that the further away a star or something from another galaxy is, the faster it is moving.

Journal 2

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

-         Walter Adams.

-         Ralph Alpher.

-         Robert Dicke.

Walter Adams:

Journal 3:

-         What do you think the Phoenix will find?

-         Do you think as a planet we should be researching other planets? Why/ why not?

-         Any other comments.

1. The newly landed phoenix, I think it will find the different types of rocks that are on mars, the makeup of the atmosphere, and try to find if there is any liquid water.

2. As a planet, I think we shouldn’t be researching others. The reason we are researching other planets is to see if we would be able to live on them. As a planet we should be responsible enough to take care of what we have and to use the resources wisely.

3. We are wasting time and not thinking about the future of our planet. How about we stop looking for a place to run and start to fix the impending problems of climate change and resource shortages.

Journal 4

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