1. (a) (i) B; 1
(ii) A; 1
(b) Hz; 1
(c) (i) An explanation to include:
1.
ripples are transverse waves;
2. (movement) displacement only in the vertical plane; 2
2. (movement) displacement only in the vertical plane; 2
(ii) energy; 1
[6]
2. (a) 4 (cm);
[accept 0.04 m] 1
[accept 0.04 m] 1
(b) 3 1
(c) ripples
at 90 degrees / vertical displacement (up / down);
to wave travel / not forward and back; 2
to wave travel / not forward and back; 2
(d) Any
two valid types of transverse waves, for example:
1. light
waves;
2. radio waves;
3. ‘S’ waves;
4. micro waves;
5. γ rays;
6. TV waves;
7. ultraviolet waves;
8. infra red waves;
9. vibrating string / rope;
10. slinky in right direction; 2
2. radio waves;
3. ‘S’ waves;
4. micro waves;
5. γ rays;
6. TV waves;
7. ultraviolet waves;
8. infra red waves;
9. vibrating string / rope;
10. slinky in right direction; 2
[em wave – 1 mark
no further mark for named em wave,
for example
em waves
infra red
will score 1 mark only]
no further mark for named em wave,
for example
em waves
infra red
will score 1 mark only]
[Reject
water ripples on water / tidal]
(e) correct
position shown including line; 1
[Allow reasonable tolerance]
[Allow reasonable tolerance]
[7]
3. (a) change of direction / speed of light in a
new medium / OWTTE;
(ignore bending) 1
(ignore bending) 1
(b) greater
refraction shown at P;
emergent ray shows greater refraction;
(these marks are independent) 2
emergent ray shows greater refraction;
(these marks are independent) 2
[3]
4. (a) A
calculation to include:
1. v = f ´ l;
2. = 200 000 Hz ´ 1500 m;
3. = 300 000 000 m/s;
[Accept 200 Hz ´ 1500 m = 300 000 m/s for 2 marks]
[Allow 300 000 for 1 mark (i.e. no unit)] 3
2. = 200 000 Hz ´ 1500 m;
3. = 300 000 000 m/s;
[Accept 200 Hz ´ 1500 m = 300 000 m/s for 2 marks]
[Allow 300 000 for 1 mark (i.e. no unit)] 3
(b) C; 1
[4]
5. (a) four or five points plotted correctly 2
Allow
1 mark for two or three points plotted correctly
curve drawn; 1
curve drawn; 1
(b) decreases 1
(c) (i) 1.2
m ; 1
(ii) speed = frequency × wavelength
=
1250 Hz × 1.2 m;
=
1 500 m/s 3
Allow full marks for a correct
calculation based on an incorrect answer to (c)(i)
[8]
6. 
All
four correct - 3 marks
three/two
correct - 2 marks
one
correct - 1 mark
[3]
7. (i) microwave; 1
(ii) ultraviolet; 1
(iii) cell damage / cancer / sterility / damage to
unborn babies; 1
(iv) Any
two from:
1. transverse;
2. same speed (in vacuum);
3. travels in a vacuum; 2
[Accept any correct wave
property]
[6]
