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