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Samenvatting Natuurkunde - hoofdstuk 4
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Bevat samenvatting van hoofdstuk 4.
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Natuurkunde Hoofdstuk 4 3 VWOParagraaf 1 Lichtbreking
Normaal: Plaats waar de lichtstraal het perspex raakt. (loodrecht)
Hoek van inval: Hoek tussen “normaal” en” inval”.(i)
Hoek van breking: Hoek tussen “normaal” en “gebroken lijn” (r)
Situatie A ˂i = groter dan ˂r
Situatie B ˂i = kleiner dan ˂ r
Brekingswet van snellius
Sin i = n n= brekingsindex (hoe groter brekingsindex hoe sterker de breking)
Sin r
n i x sin i = n r x sin r lucht brekingsindex is 1
Rekenmachine 55° = Type: sin 55 = 0,82
O,82 = Type: shif sin 0,82 = 55°
Kleurschifing bij lenzen: chromatische aberratie
Paragraaf 2 De lens
Positieve lens: Voorbeeld fototoestel werking is “convergerend”
Negatieve lens: Voorbeeld brillen werking is “divergerend”
Fototoestel :
- Diafragma regelt het licht
- Objectief is de positieve lens
Het beeld wordt omgekeerd op de chip afgebeeld
- Sluitertijd regelt de hoeveelheid licht.
Paragraaf 3 Rekenen aan lezen
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