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WorksheetsIB Physics Final Topic 4
Total questions: 38
Worksheet time: 1hrs 16mins
Name
Class
Date
1.
A surveyor’s device emits a laser pulse.
What is the time taken for the pulse to travel from the device to a wall 150 m away, where it is reflected, and then return to the device?
What is the time taken for the pulse to travel from the device to a wall 150 m away, where it is reflected, and then return to the device?
a)
0.05ns
b)
0.10ns
c)
0.50μs
d)
1.0μs
2.
The period of an electromagnetic wave is 1.0ns. What are the frequency and wavelength of the wave?
a)
A
b)
B
c)
C
d)
D
3.
X and Y are two points on the surface of water in a ripple tank. A source of waves of constant frequency begins to generate waves which then travel past X and Y, causing them to oscillate. What is the phase difference between X and Y?
a)
45°
b)
135°
c)
180°
d)
270°
4.
A monochromatic plane wave of speed c and wavelength λ is diffracted at a small aperture. The diagram illustrates successive wavefronts.
After what time will some portion of the wavefront XY reach point P?
After what time will some portion of the wavefront XY reach point P?
a)
3λ/2c
b)
2λ/c
c)
3λ/c
d)
4λ/c
5.
The four graphs represent a progressive wave on a stretched string.
Graphs A and B show how the displacement d varies with distance x along the string at one instant. Graphs C and D show how the displacement d varies with time t at a particular value of x.
The labels on the graphs are intended to show the wavelength λ, the period T and the amplitude a of the wave, but only one graph is correctly labelled. Which graph is correctly labelled?
Graphs A and B show how the displacement d varies with distance x along the string at one instant. Graphs C and D show how the displacement d varies with time t at a particular value of x.
The labels on the graphs are intended to show the wavelength λ, the period T and the amplitude a of the wave, but only one graph is correctly labelled. Which graph is correctly labelled?
a)
A
b)
B
c)
C
d)
D
6.
Which statement about sound waves in air at constant temperature is correct?
a)
Amplitude is inversely proportional to velocity.
b)
Frequency is inversely proportional to wavelength.
c)
Velocity is proportional to wavelength.
d)
Wavelength is proportional to amplitude.
7.
The basic principle of note production in a horn is to set up a stationary wave in an air column. For the lowest note produced by a horn, a node is formed at the mouthpiece and the antinode is formed at the bell. The frequency of this note is 75 Hz. What are the frequencies of the next two higher notes for this air column?
a)
A
b)
B
c)
C
d)
D
8.
Which electromagnetic wave phenomenon is needed to explain the spectrum produced when white light falls on a diffraction grating?
a)
coherence
b)
interference
c)
polarisation
d)
refraction
9.
Which statement about different types of electromagnetic wave is correct?
a)
The frequency of infra-red waves is less than the frequency of blue light.
b)
The frequency of radio waves is greater than the frequency of gamma rays.
c)
The wavelength of red light is less than the wavelength of ultraviolet waves.
d)
The wavelength of X-rays is greater than the wavelength of microwaves.
10.
Electromagnetic waves of wavelength λ and frequency f travel at speed c in a vacuum. What describes the wavelength and speed of electromagnetic waves of frequency f / 2?
a)
A
b)
B
c)
C
d)
D
11.
The diagram shows a standing wave on a string. The standing wave has three nodes N1, N2 and N3.
Which statement is correct?
Which statement is correct?
a)
All points on the string vibrate in phase.
b)
All points on the string vibrate with the same amplitude.
c)
Points equidistant from N2 vibrate with the same frequency and in phase.
d)
Points equidistant from N2 vibrate with the same frequency and the same amplitude.
12.
A pipe, open at both ends, has a length L. The speed of sound in the air in the pipe is v. The frequency of vibration of the fundamental (first harmonic) standing wave that can be set up in the pipe is
a)
v/2L
b)
L/2v
c)
4v/L
d)
L/4v
13.
Which graph correctly shows how the acceleration a of a particle undergoing SHM varies with its displacement x from its equilibrium position?
a)
A
b)
B
c)
C
d)
D
14.
The wavelength of a standing (stationary) wave is equal to
a)
the distance between adjacent nodes.
b)
twice the distance between adjacent nodes.
c)
half the distance between adjacent nodes.
d)
the distance between a node and an adjacent antinode.
15.
Unpolarized light is shone through two identical polarizers whose axes are parallel.
The ratio I/Io is
The ratio I/Io is
a)
100 %.
b)
50%.
c)
25%.
d)
0%.
16.
Standing waves in an open pipe come about as a result of
a)
reflection and superposition.
b)
reflection and diffraction.
c)
superposition and diffraction.
d)
reflection and refraction.
17.
For a system executing simple harmonic motion, the restoring force acting on the system is
a)
proportional to the displacement of the system from equilibrium.
b)
amplitude of oscillation.
c)
elastic potential energy.
d)
frequency of oscillation.
18.
A wave pulse is travelling to the right along a string. Which of the following best represents the direction of the velocity of the point P?
a)
→
b)
←
c)
↑
d)
↓
19.
Which of the following is NOT required for a simple pendulum undergoing simple harmonic oscillation?
a)
a large spring constant
b)
gravitational force
c)
a small amplitude
d)
a massless string
20.
An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its kinetic energy is a minimum?
a)
at either A or B
b)
midway between A and B
c)
one-third of the way between A and B
d)
one-fourth of the way between A and B
21.
An amusement park ride has a frequency of 0.064 Hz. What is the ride’s period?
a)
0.064 sec
b)
6.4 sec
c)
2pi / 0.064
d)
15.625 sec
22.
The wave's amplitude can be determined by measuring the distance between point ______ and point ______.
a)
A & B
b)
A & E
c)
C & E
d)
B & D
23.
What type of wave is pictured here?
a)
Longitudinal
b)
Transverse
c)
Standing
d)
Nodal
24.
What type of wave is pictured here?
a)
Longitudinal
b)
Transverse
c)
Standing
d)
Nodal
25.
A child swings on a playground swing. How many times does the child swing through the swing's equilibrium position during the course of a single period of motion?
a)
4
b)
3
c)
2
d)
1
26.
In simple harmonic motion, the displacement is maximum when the:
a)
acceleration is zero
b)
velocity is maximum
c)
velocity is zero
d)
kinetic energy is maximum
27.
Sound waves travel 10 times as fast through steel as they do through air. What happens to the wavelength of a 200Hz sound wave as it enters steel from the air?
a)
It decreases by a factor of 10.
b)
The wavelength remains the same.
c)
It increases by a factor of 10.
d)
It increases by a factor of 100.
28.
Compared to wave E, wave B
a)
has half the wavelength and twice the loudness
b)
has twice the frequency and one-fourth the loudness
c)
has twice the frequency and half the loudness
d)
has half the wavelength, half the amplitude, and is 180o out of phase
29.
Which of the following characteristics of a sound wave determines how loud it is?
a)
frequency
b)
wavelength
c)
speed
d)
amplitude
30.
Polarizing lenses prove that light
a)
Is a longitudinal wave that vibrates constantly.
b)
Is a transverse wave that can only vibrate in a single plane.
c)
Is a longitudinal wave that travels at a speed 3⋅10⁸ m/s
d)
Is a transverse wave that has multiple planes of vibration.
31.
A light ray leaves the water and enters the air, how does it bend?
a)
Toward the Normal Line
b)
Away from the Normal Line
c)
At the exact angle with the Normal
d)
It will bend a lot
32.
Which arrow shows the correct refraction of light?
a)
A
b)
B
c)
C
d)
D
33.
Red light is passed through two narrow slits and forms a pattern of bright and dark lines on a screen. The two wave behaviours primarily responsible for this pattern are
a)
Reflection and Refraction
b)
Polarization and Doppler Effect
c)
Diffraction and Interference
d)
Resonance and Interference
34.
A ray of light traveling from air into crown glass strikes the surface at an angle of 30 degrees. What is the angle of refraction? (air n=1, crown glass n=1.532)
a)
39.7 degrees
b)
19.2 degrees
c)
59.1 degrees
d)
12.3 degrees
35.
What is the index of refraction of a refractive liquid if the angle of incidence in the air is 35 degrees and the angle of refraction is 14 degrees?
a)
1.33
b)
2.21
c)
2.37
d)
1.72
36.
Which of the following will increase the spacing of Young's double slit fringes
a)
A blue light is used instead of a red light
b)
the screen is moved closer to the slits
c)
the slits are moved closer together
d)
Each slit is made wider
37.
Which of the following has no effect on the spacing of Young's double slit fringes
a)
Changing the wavelength
b)
Changing the frequency
c)
Moving the screen further away
d)
Changing the size of each slit
38.
A red light has a wavelength of 650nm.
It is shone through a double slit spacing 0.2mm onto a screen 2m away.
The fringe spacing is?
It is shone through a double slit spacing 0.2mm onto a screen 2m away.
The fringe spacing is?
a)
6.5 x 10-6 m
b)
1.6 x 10-3 m
c)
6.5 x 10-3 m
d)
1.6 x 10-6 m
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