Skip to main content

Are X-rays Safe?

X-rays pass through our flesh and organs. The large calcium molecules that make up our skeleton block the path of x-rays. This results in the negative image seen here
X-rays pass through our flesh and organs. The large calcium molecules that make up our skeleton block the path of x-rays. This results in the negative image seen here 

•Did you know that falling out of bed kills 450 people a year in the US. 

•Ants claim another 30 lives and vending machines kill around 13 people; Safety is a relative term.

•An x-ray is a form of high energy radiation with a wavelength about 10,000 times shorter than that of visible light. 

•The danger with x-rays is that they can knock electrons away from atoms, creating ions; this is why x-rays are called 'ionising radiation'. 

•Ions are much more reactive than atoms and can shoot about your body damaging important molecules like DNA. 

•This can cause mutation, or even cancer, if the dose is high enough.

•But that is the key - 'if the dose is high enough.' 

•The increase in radiation your body receives during an x-ray is equivalent to the extra radiation you are exposed to during a trans-atlantic flight.

•Medical x-rays are now very safe (the technician is in greater danger than you are due to the frequency of possible exposure), and much safer than being cut open every time a doctor needs to look inside you.


Comments

Popular posts from this blog

How Energy conversion from coal is done?

Single generator sets of over 600 MW are now used in the UK, though there are many smaller generators in use. A 600 MW generator can supplythe average needs of over 1 million UK households. Three or four such generators are typically installed in a single large coal-fired station which isoften sited close to a coal mine, away from the city dwellers who consume the electricity. Such generators are usually driven by a compound arrangement of highpressure, intermediate-pressure and low-pressure turbines, increasing in size as the pressure decreases. Modern turbines rotate in a speed range from 1500 to 3500 r.p.m., usually 3000 r.p.m. for the UK’s 50 Hz system. For large coal-fired plant the steam pressure could be 25 megapascals (MPa) with steam temperatures of 500–600 °C to improve the thermodynamic efficiency. In nuclear reactors, which operate under less demanding conditions, the steam is superheated to about 5 MPa and 300 °C. Modern water tube boilers are complex and have ...

How Bulletproof glass works?

Shattering the science behind what makes the breakable unbreakable Bullet-resistant glass works by absorbing a bullet’s kinetic (movement) energy and dissipating it across a larger area. Multiple layers of toughened glass are reinforced with alternated layers of polycarbonate – a tough but fl exible transparent plastic which retains the see-through properties of glass. As a bullet strikes the fi rst glass layer, the polycarbonate layer behind it forces the glass to shatter internally rather than outwards.  This process absorbs some of the bullet’s kinetic energy. The high velocity impact also fl attens the bullet’s head. Imagine trying to pierce through a sheet of cotton with the top end of a pencil. It would be very diffi cult compared to using the sharp pointed end. The same principle applies here. The fl at-headed bullet struggles to penetrate the layer of polycarbonate. As the bullet travels through each layer of glass and polycarbonate, the process is repeated until it no l...

How Coal mining is done?

Coal miners literally move mountains to feed our insatiable appetite for cheap energy There’s something brutally simple about coal mining. Take away the monstrous new machinery and ecofriendly marketing jargon and it’s the same dirty, dangerous job it’s always been: fi nd the black stuff and dig it up. The two major schools of coal mining are surface mining and underground mining. To qualify for surface mining, the coal seam must lie within 60 metres of the surface. The miners’ job is to remove all of the ‘overburden’ – the cubic tons of rock, soil and trees above the coal seam – and expose the coal layer for extraction. The main tools of the trade are dynamite and dragline excavators, 2,000-ton behemoths that can move 450 tons of material with one swoop of their massive buckets. Perhaps the most dramatic and controversial surface mining technique is Mountaintop Removal (MTR), in which miners use explosives and heavy machinery to literally knock the top off a mountain – up to 200 ...