Transcript 1. NAT 5 Waves and Radiation Questions

NAT 5 Waves
and Radiation
QUESTION 1
What is Light?
QUESTION 2
State the angle of incidence
and the angle of reflection in
the diagram below.
QUESTION 3
What is the definition of the
term ‘refraction’?
QUESTION 4
State the names of the wave
effects at point P and point Q.
QUESTION 5
Redraw the diagram below showing the
normal, angle of incidence, angle of
refraction and the passage of the ray of
light as it leaves the block.
QUESTION 6
State the letters used for angle
of incidence and angle of
refraction in the diagram below.
QUESTION 7
State the names of the two parts of
the eye where refraction will take
place.
QUESTION 8
State the names of the two types of
sight defect and the corresponding
lenses that are used to correct them.
QUESTION 9
Complete the rays of light below to
demonstrate how far away objects
appear blurred.
QUESTION 10
Redraw the diagram below to show how
the sight defect in Q9 is corrected.
QUESTION 11
State the definition of the term ‘critical
angle’.
QUESTION 12
State the critical angle of the
semi-circular shaped medium below.
QUESTION 13
What is an optical fibre?
QUESTION 14
Complete the path of the ray of
light through the optical fibre below.
QUESTION 15
State the definition of the term
‘frequency’ and the unit is it
measured in?
QUESTION 16
Calculate the frequency of a
source if it produces 7200 waves
in 6 minutes.
QUESTION 17
Sketch and label the following two
waveforms:
• Small amplitude with a large frequency
• Large amplitude with a small frequency
QUESTION 18
Compare the speed of sound in the three
states of matter in descending order.
QUESTION 19
Draw a fully labelled diagram
and use it to describe how
you would measure the speed
of sound in air.
QUESTION 20
The ultrasonic pulses travelling at
340ms-1 have an echo time of 0.002s.
Calculate the distance between the
rear of the car and the wall.
QUESTION 21
What instrument is used to measure
sound level and which unit is it
measured in?
QUESTION 22
State the range of human hearing.
QUESTION 23
What is meant by the term ‘ultrasound’ ?
QUESTION 24
How does ultrasound use reflection to
build up the picture of an unborn baby in
the mothers womb (uterus)?
QUESTION 25
Pneumatic drill operators wear ear
protectors. State their purpose and
describe how they work.
QUESTION 26
Describe transverse and longitudinal
waves in terms of the direction of the
waves produced and the vibration of the
particles in the wave.
QUESTION 27
Identify the transverse and the
longitudinal waves in the diagram below.
QUESTION 28
State the name of one form of
longitudinal wave.
QUESTION 29
State the names of nine types of
transverse wave.
QUESTION 30
State one factor which is common to
all of the waves in the electromagnetic
spectrum.
QUESTION 31
State two factors which are different for
each of the waves in the electromagnetic
spectrum.
QUESTION 32
Which of the following statements
is/are true about the members of the
electromagnetic spectrum?
QUESTION 33
State the names of the unknown
electromagnetic radiations P,Q and R.
QUESTION 34
A signal generator connected to a
loudspeaker produces sounds of
frequency 6800Hz.
Calculate the wavelength of the sounds
produced.
QUESTION 35
A Helium-Neon laser emits light of
wavelength 670nm.
Calculate the frequency of the light.
QUESTION 36
The wave diagram below takes 0.5s to
travel the 108m.Calculate or find:
a) Amplitude b) Speed c) Wavelength
d) the frequency of the waves.
QUESTION 37
Calculate the period of a water wave
if 80 waves pass a particular point in
320 seconds.
QUESTION 38
Diffraction is the effect involving
waves bending around an obstacle.
Does greater diffraction occur with
short or long wavelength waves?
QUESTION 39
Redraw the diffraction diagram below
with longer wavelength waves.
QUESTION 40
a) In the visible spectrum, does red or
violet light have the longest wavelength?
b) State which wave effect is taking place
in the diagram below.
QUESTION 41
State the member of the EM spectrum
involved in the applications below:
a)A luggage scanner at an airport?
b)Heat treatment from a physiotherapist?
c)Radioactive tracing within the body?
d)Mobile telephone transmission?
QUESTION 42
The diagram below shows the simple
model of an atom. State the names of
particles X,Y and Z.
QUESTION 43
State what is meant by the term
‘ionisation’.
QUESTION 44
Which row in the table describes an alpha
particle, beta particle and a gamma ray?
QUESTION 45
A radioactive source emits alpha, beta and
gamma radiation.
Which radiations will be found at X and Y in
the diagram below?
QUESTION 46
State the name of a radiation detector.
QUESTION 47
A radioactive tracer is injected into a
patient to study the flow of blood.
State the two criteria that the tracer should
have in terms of half-life and the particles
emitted.
QUESTION 48
a)Why do Health and Nuclear Physicists wear
film badges throughout their working day?
b)What do the film badges consist of?
c)What two factors do the film badges monitor?
QUESTION 49
What is the definition of the term ‘activity’?
State the activity equation listing all of the
quantities and units involved.
QUESTION 50
For a particular radioactive source 7200
atoms decay in 12 minutes.
Calculate the activity of the source.
QUESTION 51
State what is meant by the term ‘absorbed
dose’.
State the equation for absorbed dose listing all
of the quantities and units involved.
QUESTION 52
A sample of tissue has a mass of 0.05kg.
The tissue is exposed to radiation and
absorbs 0.2J of energy in 4 minutes.
Calculate the absorbed dose.
QUESTION 53
State what is meant by the term ‘equivalent
dose’.
State the equation for equivalent dose listing
all of the quantities and units involved.
QUESTION 54
A technician receives an absorbed dose
of 60µGy of alpha particles (WR = 20).
Calculate the equivalent dose received by
the technician.
QUESTION 55
Which of the following statements made
by a Physics student are true?
QUESTION 56
State the definition of the ‘half-life’ of a
radioactive source.
QUESTION 57
Strontium 90 has a half-life of 28 years.
Calculate how long it takes to decrease to
1/32nd of its original activity.
QUESTION 58
A radioactive source has an activity of
300Bq at 6pm.
Calculate the activity that the source
had at 8am that morning if it has a
half-life of 2.5 hours.
QUESTION 59
Use the graph below to find the half-life of
the radioactive source.
QUESTION 60
State four factors which affect the
background radiation level.
QUESTION 61
Which of the following statements about
the function of parts of a nuclear reactor
is/are true?
QUESTION 62
Which of the following is/are true about
nuclear fission?
QUESTION 63
The following happens during an induced
nuclear fission reaction. What must also
be released to allow a chain reaction to
occur?
QUESTION 64
State two advantages and two
disadvantages that nuclear fuels have
over fossil fuels.
QUESTION 65
The following information was taken for a
radioactive source over a 4 minute period.
Calculate or find:
a) Number of nuclei that have decayed
b) Absorbed Dose
c) Equivalent Dose.
The End