Physics · May / June 2020 · Paper 41 · Question 5
0625
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The question as text
The distance between the centre of a thin converging lens and each principal focus is 5.0 cm.
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5(a)[2]
(point) where incident parallel rays meet after passing through lens OR origin of rays that emerge parallel after passing through lens
on principal axis OR use of term paraxial OR centre line
5(b)(i)[2]
enlarged virtual upright
two correct answers underlined AND no more than one wrong answer underlined
three correct answers underlined AND no wrong answer underlined
5(b)(ii)[4]
both principal focuses marked at points 5.0 cm from the optical centre
any two construction lines from:
line from top of I towards far principal focus and traced back from lens horizontallyline from top of I to (and through) centre of lenshorizontal line from top of I to lens and traced back to near principal focus2.7 cm ⩾ distance ⩾ 3.1 cm
O marked with top at intersection
5(b)(iii)[1]
2.7 cm ⩾ distance ⩾ 3.1 cm
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