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Physics for IGCSE & O level - Rays And Waves (Section 10)

1
What are the main components of an optical fibre?
Answer
(A)
A core and a cladding
2
What is the angle of incidence equal to?
Answer
(B)
Angle of reflection
3
What is the formula to determine the refractive index?
Answer
(A)
Speed of light in a vacuum / Speed of light in a medium
4
What is the primary role of the normal in reflection?
Answer
(A)
To determine the angle of reflection.
5
What is the name of the ray that strikes the mirror?
Answer
(B)
Incident ray
6
In a camera, where is the image formed?
Answer
(B)
In the focal plane
7
Which type of mirror produces virtual images?
Answer
(D)
All of the above
8
What happens to the frequency of a wave as the energy increases?
Answer
(C)
Increases
9
When light is refracted, what changes?
Answer
(C)
Direction
10
What are the essential components for a camera?
Answer
A
B
C
11
In a medium, if the angle of incidence exceeds the critical angle, what happens?
Answer
(C)
Total internal reflection occurs.
12
Which is an example of regular reflection?
Answer
(B)
Light from a mirror
13
Which type of wave is used in the transmission path of a telephone system?
Answer
(D)
All of the above
14
Which of the following can be used in a periscope?
Answer
A
B
15
What must enter your eyes to see an object?
Answer
A
B
16
What is formed when light bounces off an object?
Answer
(B)
A reflected ray
17
What causes the separation of white light into colors when it passes through a prism?
Answer
(B)
Refraction and dispersion
18
What type of reflection occurs when light is scattered in all directions?
Answer
(B)
Diffuse reflection
19
What are the main components in light?
Answer
A
B
20
What is an example of an item that uses RFID technology?
Answer
(B)
A book from the library
21
How can the speed of light be measured?
Answer
(B)
km/s
22
What is the refractive index of a medium defined as?
Answer
(B)
speed of light in a vacuum / speed of light in a medium
23
What is the role of a medium in the total internal reflection process?
Answer
(D)
It must be more dense than the surrounding medium
24
What are some applications of lenses?
Answer
A
B
C
25
Which part of the eye helps with color vision?
Answer
(A)
Retina
26
In the case of reflection, what is the surface called?
Answer
(D)
Mirror
27
Which of the following is an example of a non-luminous object?
Answer
(C)
A mirror
28
What does a smooth surface do with light?
Answer
(C)
Reflects light regularly
29
What is the definition of reflection?
Answer
(B)
The bouncing back of light.
30
What part of the electromagnetic spectrum is visible to the human eye?
Answer
(B)
Visible light
31
What is the angle called where light is refracted at 90°?
Answer
(C)
Critical angle
32
What does a prism do when white light passes through it?
Answer
(B)
Refracts white light
33
What is the meaning of a virtual image?
Answer
(C)
An image that can't be captured on a screen
34
If the refractive index of a medium is high, how will the light bend?
Answer
(A)
It will bend more towards the normal.
35
What can be used to demonstrate the properties of light?
Answer
A
B
C
D
36
What is the main benefit of digital signals in communication?
Answer
A
B
C
37
What occurs when light rays are parallel to each other after reflection?
Answer
(A)
Regular reflection
38
What is the role of a prism?
Answer
(B)
Refract and disperse light
39
If you see a letter, where does the light originate from?
Answer
(B)
The light source reflecting off the letter
40
If the angle of incidence is 0 degrees, what is the angle of refraction?
Answer
(A)
0 degrees
41
In what context are optical fibres primarily used?
Answer
(B)
For long-distance transmission of data and signals.
42
Which of the following is a type of telecommunication?
Answer
A
B
C
43
What is the primary function of optical fibers?
Answer
(B)
To transmit light signals over long distances.
44
What is required for reflection?
Answer
A
B
C
45
Which of the following is always used to measure angles of reflection and incidence?
Answer
(B)
The normal
46
What causes an electric current?
Answer
(B)
Moving charged particles.
47
What is the surface called where the light strikes?
Answer
(C)
The mirror
48
How does a speaker create sound?
Answer
(C)
By producing a copy of the original sound.
49
What type of image can be formed in a plane mirror?
Answer
(B)
Virtual image
50
How many laws of reflection are there?
Answer
(B)
Two