22 The warning signal on an
The ambulance is ambulance
traveling
with
hasa frequency of 600 Hz. The
speed of
ambulance passes, and then moves aaway
constant velocity of 25 ms sOund is 330 ms'.
from the observer with towards an observer. The
no change in velocity.
b6ov330 initial position
of ambulance final position
(330-25 of ambulance
boox330 observer
wnich overall change in observed
frequency takes place between the times at tuay
abulance is a long way behind the observer
330+25 and when it is a long way in front of which the
A 49 Hz the observer?
B 84Hz (C) 91 Hz D 98Hz
23 Brief pulses of red,
blue and green light are
emitted from the Sun at the same time.
The pulses travel the same
for the full distance to reach Mars.
duration of their joumey. Assume that the pulses travel in a
vacuum
In which order would
these pulses of light arrive at Mars?
(A)all arrive at the same time
blue first, then green, then red
C red first, then blue,
then green
D red first, then green, then blue
24 Two coherent
progressive waves from different sources meet at a point.
Which condition must be satisfied for there to be zero
waves meet? resultant amplitude at the point where the
A The two waves must be emitted from their Som a mpa
sources with the same intensity. an be)
The two waves must be in phase with
each other at the point.
C The two waves must be
travelling in
D)The two waves must have the same
opposite directions.
amplitude at the point. 'staluray
wawe,
8
Slat
OUCLES 2022 can b dlluet
9702/12FM22
[Turn over
The ambulance is ambulance
traveling
with
hasa frequency of 600 Hz. The
speed of
ambulance passes, and then moves aaway
constant velocity of 25 ms sOund is 330 ms'.
from the observer with towards an observer. The
no change in velocity.
b6ov330 initial position
of ambulance final position
(330-25 of ambulance
boox330 observer
wnich overall change in observed
frequency takes place between the times at tuay
abulance is a long way behind the observer
330+25 and when it is a long way in front of which the
A 49 Hz the observer?
B 84Hz (C) 91 Hz D 98Hz
23 Brief pulses of red,
blue and green light are
emitted from the Sun at the same time.
The pulses travel the same
for the full distance to reach Mars.
duration of their joumey. Assume that the pulses travel in a
vacuum
In which order would
these pulses of light arrive at Mars?
(A)all arrive at the same time
blue first, then green, then red
C red first, then blue,
then green
D red first, then green, then blue
24 Two coherent
progressive waves from different sources meet at a point.
Which condition must be satisfied for there to be zero
waves meet? resultant amplitude at the point where the
A The two waves must be emitted from their Som a mpa
sources with the same intensity. an be)
The two waves must be in phase with
each other at the point.
C The two waves must be
travelling in
D)The two waves must have the same
opposite directions.
amplitude at the point. 'staluray
wawe,
8
Slat
OUCLES 2022 can b dlluet
9702/12FM22
[Turn over
