X-RAYSBi-Polar GroupDaet_Denolo_Magdaong_Magtibay_Nicolas _Sarmiento_Tala

WAVELENGTH

Most X-rays have a wavelength of 0.01 to 10 nanometers

ENERGY 124 eV -> upward

ENERGY Much higher energy and much shorter wavelengths

than ultraviolet light Scientists usually refer to x-rays in terms of their

energy rather than their wavelength

ENERGY Much higher energy and much shorter wavelengths

than ultraviolet light Scientists usually refer to x-rays in terms of their

energy rather than their wavelength

ENERGY High energy diagnostic medical x-

ray photons: 200,000 eV (=0.2 MeV)

FREQUENCY

Most X-rays have a frequency of about 1019 Hz

SOURCES

What is reflected back isn't electrons nor light, but a beam of x-rays

X-rays are formed when a beam of electrons are reflected back by a certain kind of metal

Ex. Tungsten

EXAMPLE AND APPLICATION Photographs made with X rays are

known as radiographs or skiagraphs

EXAMPLE AND APPLICATION Photographs made with X rays are

known as radiographs or skiagraphs

EXAMPLE AND APPLICATION Radiography

Medicine and industry Valuable for diagnosis and

nondestructive testing of products for defects

EXAMPLE AND APPLICATION Radiography

Medicine and industry Valuable for diagnosis and

nondestructive testing of products for defects

Radiography examination

and analysis of paintings

can reveal details (age, underlying brushstroke techniques, identify or verify the artist)

MICRORADIOGRAPHY (EXAMPLE AND APPLICATION)

Also called X-ray microscopy Provides enlarged images of the structure of

opaque objects

HARD AND SOFT X-RAY

Hard x-rays are the highest energy x-rays Lower energy x-rays are referred to as

soft x-rays

HARD AND SOFT X-RAY

The distinction between hard and soft x-rays is not well defined

Factors relevant to the distinction: instruments required to observe x-rays the physical conditions under which the x-rays

are produced

RAYS BETWEEN VISIBLE LIGHT

Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays

Comes from the sun (invisible to the human eye) It makes black-light posters glow, and is responsible for summer

tans — and sunburns Too much exposure to UV radiation is damaging to living tissue

END OFPRESENTATION

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