Physics for IGCSE & O level - Rays And Waves (Section 8)
1
An object is placed in front of a plane mirror. How will the image size compare to the object's size?
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(C)
The same size
2
What happens when light travels from a less dense medium to a more dense medium?
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(D)
Both A and C
3
Which lens type is commonly used in cameras?
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(B)
Converging lens
4
What kind of waves do mobile phones use?
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(B)
Microwaves
5
What are some of the properties of electromagnetic waves that travel from a source?
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A
B
C
6
In the eye, the lens changes shape to focus images. What is this process called?
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(A)
Accommodation
7
What is the speed of light in 300,000 km/s in?
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(C)
vacuum
8
What can cause ionization?
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A
B
9
What will happen to the light when the angle of incidence is less than the critical angle?
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(B)
Refraction will occur
10
What are some uses for Infrared radiation?
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B
D
11
Which of the following is a form of radiation?
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(B)
Light
12
Which of the following is a true statement about image size in a plane mirror?
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(C)
The image is the same size as the object.
13
What is the name of the angle between the reflected ray and the normal?
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(C)
Angle of reflection
14
What happens to the angle of refraction when the incident light travels from a medium with a lower refractive index to a medium with a higher refractive index?
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(C)
The angle of refraction is less than the angle of incidence.
15
Which of the following are uses of lenses?
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A
B
C
16
What is the angle formed by the reflected ray and the normal called?
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(B)
Angle of reflection
17
In a plane mirror, if the object is 2 meters away from the mirror, where will the image form?
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(B)
2 meters behind the mirror
18
What does the term 'UHF' stand for?
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(A)
Ultra High Frequency
19
What is a form of radiation?
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A
B
20
What is the primary function of a transmitting antenna in a radio system?
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(C)
To emit radio waves
21
What is the main function of a microphone in a telephone system?
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(B)
To convert sound into electrical signals.
22
If the angle of incidence is 30 degrees, what is the angle of reflection?
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(B)
30 degrees
23
What kind of images are formed in a plane mirror?
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(B)
Virtual images
24
What are rays used to represent?
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(A)
The direction of light
25
What happens to light when the angle of incidence is less than the critical angle?
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(B)
Refraction
26
Which term describes a lens that makes objects appear larger?
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(B)
Magnifying lens
27
In which scenario would you observe a rainbow?
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(B)
When sunlight hits raindrops
28
What is the process called when light bends as it passes through one medium to another?
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(B)
Refraction
29
Which factor does the value of critical angle depend on?
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(B)
Material
30
What is the function of the crystalline lens in the eye?
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(B)
To refract and focus light onto the retina.
31
What are the two laws of reflection?
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A
B
32
What are the common uses of RFID?
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(D)
All of the above.
33
In which type of reflection are the light rays parallel to each other after reflecting?
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(B)
Specular reflection
34
What is the relationship between the incident ray and the reflected ray?
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(B)
They form equal angles with the normal.
35
Which of the following are features of light?
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A
B
C
36
What phenomenon is responsible for a pencil appearing bent when partially submerged in water?
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(B)
Refraction
37
Which of the following is an example of a transverse wave?
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(B)
Water waves
38
Which of the following are examples of radio waves?
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(D)
All of the above
39
Which of these is required for sight?
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(B)
Light
40
What are some uses of optical fibers?
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A
B
41
Which type of radiation can cause fluorescence?
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(B)
Ultraviolet radiation
42
What effect does a converging lens have on parallel light rays?
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(B)
Causes them to converge at the focal point.
43
Which of the following materials will likely reflect the most light?
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(B)
White paper
44
What is the angle of incidence equal to?
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(B)
The angle of reflection
45
Which of the following is the unit for the speed of light?
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(A)
m/s
46
When light encounters a rough surface, what type of reflection occurs?
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(C)
Diffuse reflection
47
If an object is closer to a convex lens than the principal focus, what type of image is formed?
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(D)
Virtual, upright
48
What are the two main factors linked to the properties of light?
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B
C
49
What is the effect of a converging lens on light rays?
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B
C
D
50
What is the name of the angle between the incident ray and the normal?
