Gamma rays have very short wavelengths (10-9m to 10-11cm),
They carry large amounts of energy and can penetrate almost everything, including metals and concrete, and our bodies.They have extremely high frequencies, and a very high penetrating power, which results from the fact that they have no electric charge and thus do not interact with matter as strongly as charged particles do. They carry large amounts of energy and can penetrate almost everything, including metals and concrete, and our bodies.The powerful nature of gamma rays have made them useful in the sterilising of medical equipment by killing bacteria. They are also used to kill bacteria in foodstuffs, particularly meat and vegetables, to maintain freshness. This is called “Radiotherapy”, and works because cancer cells can’t repair themselves like healthy cells can when damaged by gamma rays. Getting the dose right is very important! There’s also targeted radiotherapy, where a radioactive substance is used to kill cancer cells – but it’s a substance that’ll be taken up by a specific part of the body, so the rest of the body only gets a low dose. An example would be using radioactive iodine to treat cancer in the thyroid gland. Gamma rays cause cell damage and can cause a variety of cancers.They cause mutations in growing tissues, so unborn babies are especially vulnerable.
X-rays are used by doctors to see inside people. They pass easily through soft tissues, but not so easily through bones. We send a beam of X-Rays through the patient and onto a piece of film, which goes dark where X-Rays hit it. This leaves white patches on the film where the bones were in the way.Sometimes a doctor will give a patient a “Barium Meal”, which is a drink of Barium Sulphate. This will absorb X-rays, and so the patient’s intestines will show up clearly on a X-Ray image.
The Essay on Skin Cancer Cells Body Called
Skin Cancer Cancer is a word used to describe a group of diseases. Each has its own name, its own treatment, and its own chances of being cured. Each is different from the others in many ways, but every cancer, whatever its called or whatever part of the body it is located in, is a disease of the body's cells. The millions of tiny cells that make up the human body are so small that they can be ...
X-Rays are also used in airport security checks, to see inside your luggage. They are also used by astronomers – many objects in the universe emit X-rays, which we can detect using suitable radio telescopes.Lower energy X-Rays don’t pass through tissues as easily, and can be used to scan soft areas such as the brain
X- rays have very short wavelengths of the range frequency and also a very high penetrating power. Within months of their discovery, X-rays became indispensable in orthopedic and dental medicine to develop the X-ray photographs of the human body’s interior.. X-rays are very high frequency waves, and carry a lot of energy. They will pass through most substances, and this makes them useful in medicine and industry to see inside things.X-rays.
Not as much a penetrating power to sufficiently penetrate the skin. They are invisible to human eyes, but can be seen by many insects. Ultra-violet radiation of very short wavelengths can be very harmful to the skin, and are responsible for causing our sunburns. But prolonged exposure can cause skin cancer, cataract and damage to the human immune system. small dose of UV rays is though beneficial to the human body, and can be used to treat some skin deseases as they can kill some harmful bacteria. Scientists today, have developed a UV index to help people protect themselves from these harmful ultraviolet waves. The layer of ozone (O3) that protects us from the ultra-violet radiation emitted by the Sun, by absorbing the short wavelength ultraviolet rays.Many scientists today believe that this life-protecting stratospheric ozone layer is being reduced by the chlorofluorocarbon gases released into the atmosphere by different sources on the earth.
When you mark your posessions with a security marker pen, the ink is invisible unless you shine a UV lamp at it.
The Essay on Major Problem Light Eye Lens
Have you ever looked up to the sky at night, and wondered what stars look like up close? Have you ever wondered how astronomers take pictures of other planets with such detail? Although the human eyes are superb detectors, they cannot see extremely faint objects or fine details on distant objects. For example, you would not be able to read the print on your skateboard magazine when it is on the ...
Ultraviolet rays can be used to kill microbes. Hospitals use UV lamps to sterilise surgical equipment and the air in operating theatres. Food and drug companies also use UV lamps to sterilise their products.
The cheaper sunglasses tend not to protect you against UV, and this can be really dangerous. When you wear sunglasses the pupils of your eye get bigger, because less light reaches them.
This means that if your sunglasses don’t block UV, you’ll actually get more ultra-violet light in your eyes than if you didn’t wear them, although you won’t notice at the time. So before you buy sunglasses, check that they offer UV protection!
Suitable doses of Ultraviolet rays cause the body to produce vitamin D, and this is used by doctors to treat vitamin D deficiency and some skin disorders. Large doses of UV can damage the retina in your eyes, so it’s important to check that your sunglasses will block UV light. Large doses of UV cause sunburn and even skin cancer. Fortunately, the ozone layer in the Earth’s atmosphere screens us from most of the UV given off by the Sun. Think of a sun tan as a radiation burn!
The visible region, despite up of a whole range of colours, mixed together. We can see this if we pass white light through a glass prism – the violet light is bent (“refracted”) more than the red, because it has being the most familiar to all humans occupies a very small region of the electromagnetic spectrum, with wavelengths between 7×105 cm and 4×105 cm. The visible region extends between the infrared and ultraviolet regions in the following order: Red Orange Yellow Green Blue Indigo VioletWhite light is actually made a shorter wavelength – and we see a rainbow of colours. Too much light can damage the retina in your eye. Our eyes can detect only a tiny part of the electromagnetic spectrum, called visible light. This means that there’s a great deal happening around us that we’re simply not aware of, unless we have instruments to detect it. Light waves are given off by anything that’s hot enough to glow. White light is actually made up of a whole range of colours, mixed together.
The Essay on All About Light-Physics
LIGHT * Light is part of the electromagnetic spectrum, the spectrum is the collection of all waves, which include visible light, Microwaves, radio waves ( AM, FM, SW ), X-Rays, and Gamma Rays. * In the late 1600s, important questions were raised, asking if light is made up of particles, or is it waves .? * Sir Isaac Newton, held the theory that light was made up of tiny particles. In 1678, Dutch ...
We can see this if we pass white light through a glass prism – the violet light is bent (“refracted”) more than the red, because it has a shorter wavelength – and we see a rainbow of colours.
This is called ‘dispersion’, and allows us to work out what stars are made of by looking at the mixture of wavelengths in the light.
We use light to see things! As the Sun sends so much light towards our planet, we’ve evolved to make use of those particular wavelengths in order to sense our environment. Light waves can also be made using a laser. This works differently to a light bulb, and produces “coherent” light.
Lasers are also used in laser printers, and in aircraft weapon aiming systems
Lasers are used in Compact Disc & DVD players, where the light is reflected from the tiny pits in the disc, and the pattern is detected and translated into sound or data.
The infrared region of the spectrum lies beyond the red end of the visible range, with wavelengths between 0.01 to 7.5×10-5 cm.Some of the materials that absorb infrared radiation are window glass, water and also our atmosphere. Although invisible to the eye, longer infrared radiation can be detected as warmth by the skin. One of the major uses of infrared rays is Infrared photography. Infrared rays are also reflected off objects, just as visible light. Special films or sensors which have the property to ‘see in the dark’ are used to observe these rays, which enhance different areas according to their heat emission. For example, in an infrared photograph, blue sky and water appear nearly black, whereas unexposed skin shows up brightly.Virtually every object at the Earth’s surface emits electromagnetic radiation primarily in the infrared region of the spectrum. Man-made sources of infrared radiation include, besides hot objects, lasers, which are used in some fibre-optic communication systems and light radar systems respectively.Other applications of infrared light include its use in remote controls, automatic self-focusing cameras, security alarm systems, and night-vision optical instruments. The danger to people from too much Infra-Red radiation is very simple – overheating.
The Essay on The Impact Of The Lasers Technology On Society
... without spreading. Here light must be understand broadly, since lasers have covered radiation at wavelengths ranging from infrared range to ultraviolet ... amplify electronic signals at audio, radio or microwave frequencies. Since laser light can be focused to a very small ... lasers. The laser beams could easily be adversely affected by atmospheric conditions, such as rain, fog, low clouds, and objects ...
Microwaves have wavelengths more than that of infrared waves, but less than that of radio waves. Microwaves cause water and fat molecules to vibrate, which makes the substances hot.
So we can use microwaves to cook many types of food.
Recent research indicates that microwaves from mobile phones can affect parts of your brain – after all, you’re holding the transmitter right by your head. The advice is to keep calls short.
Mobile phones use microwaves, as they can be generated by a small antenna, which means that the phone doesn’t need to be very big. The drawback is that, being small, they can’t put out much power, and they also need a line of sight to the transmitter. This means that mobile phone companies need to have many transmitter towers if they’re going to attract customers.
Microwaves are also used by fixed traffic speed cameras, and for radar, which is used by aircraft, ships and weather forcasters. The most common type of radar works by sending out bursts of microwaves, detecting the “echoes” coming back from the objects they hit, and using the time it takes for the echoes to come back to work out how far away the object is. Prolonged exposure to microwaves is known to cause “cataracts” in your eyes, which is a clouding of the lens, preventing you from seeing clearly (if at all!) So don’t make a habit of pressing your face against the microwave oven door to see if your food’s ready!
Recent research indicates that microwaves from mobile phones can affect parts of your brain – after all, you’re holding the transmitter right by your head. The advice is to keep calls short.
