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rentgenske zrake
X Rays are electromagnetic waves or photons not emitted from the nucleus, but normally emitted by energy changes in electrons. These energy changes are either in electron orbital shells that surround an atom or in the process of slowing down such as in an X-ray machine.
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Stanice su temeljne funkcionalne jedinice života (od njih su sastavljeni svi organizmi). Otkrio ih je Robert Hooke 1665. godine. Riječ stanica dolazi ...