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AQA A-level Physics Polarization Mark Scheme
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Mark scheme for the corresponding document: 'AQA A-level Physics Polarization Exam Style Questions'.
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B
1 [1]
A
2 [1]
C
3 [1]
(a) transverse: vibration / displacement / disturbance not movement is
4 perpendicular to direction of travel
B1
longitudinal: vibration / displacement / disturbance not movement
is parallel to (same) direction of travel
B1
C1 for idea of transverse and longitudinal being perpendicular
(2)
(b) restriction of vibration / idea of how polarisation occurs
B1
single plane / same orientation – diagram may help
B1
(2)
(c) only transverse can be polarised / longitudinal cannot
B1
idea of being able to restrict vibration to single plane
or longitudinal not being perpendicular to motion
or longitudinal vibrating in direction of travel
B1
(2)
[6]
(a) Transverse
5 B1
(b) correct example of transverse wave
( e.g. light / electromagnetic / radio etc. allow photon b.o.d.)
B1
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(c) [transverse] displacement vector perpendicular to energy
direction [accept ‘direction of motion’]
B1
[longitudinal] vector parallel to energy direction
B1
polarisation is restriction of displacement vector to one
plane OWTTE
[allow any or all marks on clear diagram]
B1
[5]
(a) (i) particle vibration (or disturbance or oscillation) (1)
6 same as (or parallel to) direction of propagation
(or energy transfer) (1)
(ii) (particle vibration)
perpendicular to direction of propagation (or energy transfer) (1)
3
(b) variation in intensity between max and min (or light and dark) (1)
two maxima (or two minima) in 360° rotation (1)
2
QWC 1
[5]
(a) maximum displacement from equilibrium/mean
7 position/mid-point/etc (1)
1
(b) (i) any one from:
surface of water/water waves/in ripple tank (1)
rope (1)
slinky clearly qualified as transverse (1)
secondary (‘s’) waves (1)
max 1
(ii) transverse wave: oscillation (of medium) is perpendicular to
wave travel
or transverse can be polarised
or all longitudinal require a medium (1)
1
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Page 8 of 12
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