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Samenvatting Natuurkunde Hoofdstuk 5 Straling en gezondheid Newton 4 vwo

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In deze samenvatting wordt hoofdstuk 5 Straling en gezondheid van Newton Natuurkunde voor 4 vwo besproken.

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Natuurkunde
Straling en gezondheid | 5

, Natuurkunde “Straling en gezondheid”

- Straling wordt uitgezonden door stralingsbron
- Straling wordt geabsorbeerd door ontvanger

Grootheid Eenheid
Naam Symbool Naam Symbool
Intensiteit I Watt/m2 W/m2
dikte d
Centimeter; Meter cm; m
Halveringsdikte d1/2
Energie (straling) E Elektronvolt Ev
Activiteit A Becquerel Bq
Tijd t
Uur; Jaar H; yr
Halveringstijd t1/2
Instabiele
N
atoomkernen
Stralingsdosis H Sievert Sv
Dosis D Joule/Kg ; Gray J/kg ; Gy
Geabsorbeerde Joule J
Estr
stralingsenergie
Massa m Kilogram Kg
Stralingsweegfactor Wr


- Straling wordt gebruikt om te onderzoeken
- Straling brengt risico’s met zich mee
↪ Veiligheidsmaatregelen voor zo laag mogelijke geabsorbeerde hoeveelheid

Atoombouw

- Bestaat ui een kern en rondom de kern bewegende elektronen
- Atoom dat elektronen opneemt/afstaat verandert in positief/negatief ion
- Ioniserende straling: straling met voldoende energie om een elektron weg te stoten


deeltje plaats in atoom massa lading
Proton Kern 1 1
Elektron Elektronenwolk 0 -1
Neutron Kern 1 0

Protonen: Atoomnummer
Elektronen: Atoomnummer
Neutronen: Massagetal – Atoomnummer
Röntgenstraling

- Röntgenstraling: energie die met lichtsnelheid wordt overgebracht
- Foton: afzonderlijke hoeveelheid energie
- Fotonenergie is evenredig met frequentie
- Doordringend vermogen: mate waarin straling doordringt
- Gevaarlijk, relatief grote energie/snelheid
- Elektromagnetische straling

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Hoofdstuk 5 straling en gezondheid
Uploaded on
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Written in
2019/2020
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