Physics for IGCSE & O level - Rays And Waves (Section 10)
1
What are the main components of an optical fibre?
2
What is the angle of incidence equal to?
3
What is the formula to determine the refractive index?
Risposta(A)
Speed of light in a vacuum / Speed of light in a medium
4
What is the primary role of the normal in reflection?
Risposta(A)
To determine the angle of reflection.
5
What is the name of the ray that strikes the mirror?
6
In a camera, where is the image formed?
7
Which type of mirror produces virtual images?
8
What happens to the frequency of a wave as the energy increases?
9
When light is refracted, what changes?
10
What are the essential components for a camera?
11
In a medium, if the angle of incidence exceeds the critical angle, what happens?
Risposta(C)
Total internal reflection occurs.
12
Which is an example of regular reflection?
13
Which type of wave is used in the transmission path of a telephone system?
14
Which of the following can be used in a periscope?
15
What must enter your eyes to see an object?
16
What is formed when light bounces off an object?
17
What causes the separation of white light into colors when it passes through a prism?
Risposta(B)
Refraction and dispersion
18
What type of reflection occurs when light is scattered in all directions?
19
What are the main components in light?
20
What is an example of an item that uses RFID technology?
21
How can the speed of light be measured?
22
What is the refractive index of a medium defined as?
Risposta(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?
Risposta(D)
It must be more dense than the surrounding medium
24
What are some applications of lenses?
25
Which part of the eye helps with color vision?
26
In the case of reflection, what is the surface called?
27
Which of the following is an example of a non-luminous object?
28
What does a smooth surface do with light?
29
What is the definition of reflection?
Risposta(B)
The bouncing back of light.
30
What part of the electromagnetic spectrum is visible to the human eye?
31
What is the angle called where light is refracted at 90°?
32
What does a prism do when white light passes through it?
33
What is the meaning of a virtual image?
Risposta(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?
Risposta(A)
It will bend more towards the normal.
35
What can be used to demonstrate the properties of light?
36
What is the main benefit of digital signals in communication?
37
What occurs when light rays are parallel to each other after reflection?
38
What is the role of a prism?
Risposta(B)
Refract and disperse light
39
If you see a letter, where does the light originate from?
Risposta(B)
The light source reflecting off the letter
40
If the angle of incidence is 0 degrees, what is the angle of refraction?
41
In what context are optical fibres primarily used?
Risposta(B)
For long-distance transmission of data and signals.
42
Which of the following is a type of telecommunication?
43
What is the primary function of optical fibers?
Risposta(B)
To transmit light signals over long distances.
44
What is required for reflection?
45
Which of the following is always used to measure angles of reflection and incidence?
46
What causes an electric current?
Risposta(B)
Moving charged particles.
47
What is the surface called where the light strikes?
48
How does a speaker create sound?
Risposta(C)
By producing a copy of the original sound.
49
What type of image can be formed in a plane mirror?
50
How many laws of reflection are there?
