X - Rays
X - Rays
The X-rays were discovered by German physicst W. Roentgen. Their frequency range is 1016 Hz to 3x 10- Hz. These are produced when high energy electrons are stopped suddenly on a metal of high atomic number.
X-rays have great penetrating power and so arc used to investigate the structure of objects and to find flaws in metals. This radiation has such high energy that It can damage cells and tissues, and also affect the genetic material inside cells. X-rays are produced when electrons hit a metal surface. This happens inside an X-ray tube. X-rays are used in radiology, to produce images of bones. They are also used in radio therapy, in which X-rays are targeted at cancer cells to kill them or stop them from multiplying.
When a patient undergoes a computed tomography (CT) scan. the X-ray sources and detectors rotate around the person. Computers then analyse the data from the CT scanner to create images of organs in the body. Because of the high energy of X-rays. it is important that people who work with them use protective lead shields and monitor their exposure levels. This is done by using a personal radiation monitoring device. The device is worn for up to three months The total, or accumulated radiation dose is then measured. The employer must ensure that this dose remains below a certain value, to protect the worker from possible harm.
X-ray Inspection System:
This is a machine used to screen luggage for dangerous items. An A-ray generator inside the machine produces X-rays, which are directed at the luggage as it passes through on a Conveyor belt. A-rays pass more easily through less-dense items than through items of high density. Sensors behind the luggage detect variation in penetration of X-rays through the sample. Differences in density can be displayed as different colours so that any items of concern can be identified.
Uses:
X-rays are used
1 In Surgery for the detection of fractures, foreign bodies like bullets, diseased organs and stones in the human body.
2. In Engineering
(i) for detecting faults, cracks, flaws and holes in final metal products
(ii) for the testing of weldings, castings and moulds.
3. In Radio Therapy, to cure un-tracable skin diseases and malignant growths.
4. In Detective Departments for detection of explosives, opium, gold and silver in the body of smugglers.
5. In Industry
(i) for the detection of pearls in oysters and defects in rubber tyres, gold and tennis balls etc.
(ii) for testing the uniformity of insulating material.
Full form of CT scan is? | |||
| Right Option : B | |||
| View Explanation | |||
X-rays are used In Surgery for the detection of __________________, foreign bodies like bullets, diseased organs, and stones in the human body. | |||
| Right Option : A | |||
| View Explanation | |||
X rays are used in Radio Therapy, to cure untraceable __________________ diseases and malignant growths. | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
