Physics for IGCSE & O level - Rays And Waves (Section 6)
1
What type of lens corrects short-sightedness?
2
What happens to light that passes through a prism?
3
What is the main function of the iris?
پاسخ دهید(B)
To control the amount of light entering the eye.
4
How does a black surface interact with light?
پاسخ دهید(C)
Absorbs most of the light
5
پاسخ دهید(A)
sin i / sin r = refractive index
6
Which part of the eye is a transparent structure that refracts light to help focus it on the retina?
7
Which part of a simple telephone system converts sound into electrical signals?
8
Which of the following can be used to measure the wavelength of light?
9
What is the relationship between the refractive index and the angle of deviation?
10
What type of signals do optical fibers transmit?
11
Which waves are used for TV broadcasts?
12
What type of waves are used in wireless communications?
13
The angle of incidence is equal to?
14
Which part of the eye refracts light the most?
15
When light travels from air into glass, which of the following happens?
پاسخ دهید(B)
It slows down and bends towards the normal.
16
What type of lens is required for long-sightedness?
17
What is the main reason for using optical fibers in telecommunications?
پاسخ دهید(C)
They can carry more signals with less attenuation.
18
Which part of the electromagnetic spectrum is used in remote controls?
20
What is the speed of light in a vacuum?
21
What is the function of the lens in the human eye?
22
What are the main parts of a simple telephone system?
پاسخ دهید(B)
Microphone, Encoder, Transmission path, Decoder, Earphone
23
What determines the color of visible light?
24
What is the name of the process when light rays bend as they pass from one medium to another?
25
What is the formula for calculating the refractive index?
پاسخ دهید(B)
refractive index = speed of light in vacuum / speed of light in medium
26
پاسخ دهید(B)
Converts information into a format for transmission.
27
Which of the following is the best definition of refraction?
28
What does a rainbow result from?
29
Which of the following is a use of RFID technology?
پاسخ دهید(B)
To identify goods in shops or libraries
30
What is the angle between the incident ray and the normal called?
31
What type of signal represents numbers?
32
What are the primary components of light?
33
What can happen to signals in analog transmission?
34
Which of these is a property of total internal reflection?
پاسخ دهید(B)
Light is totally reflected back into a less dense medium.
35
What is the speed of light in a medium?
پاسخ دهید(C)
Always slower than the speed in a vacuum.
36
What is the speed of light in a vacuum?
37
What type of reflection occurs when light bounces off a rough surface?
38
What does the term 'total internal reflection' refer to?
پاسخ دهید(C)
Light being reflected back into the same medium.
39
Which of the following components are present within a typical eye?
40
What happens when light is transmitted through a glass?
41
What do we call the process where the eye's lens changes shape to focus on objects at different distances?
42
How is light energy produced?
پاسخ دهید(B)
Energy used to produce it
43
When light reflects off a surface, what happens to the angle of incidence?
پاسخ دهید(A)
It is the same as the angle of reflection.
44
How is the speed of light commonly represented?
45
What is an example of a luminous object?
46
What is the effect called when a prism separates white light into colours?
47
Which of the following is a characteristic of electromagnetic waves?
پاسخ دهید(D)
They consist of oscillating electric and magnetic fields.
48
What property of light is demonstrated by rainbows?
پاسخ دهید(B)
Refraction and dispersion
49
What happens to light at the boundary between two media with different refractive indices?
50
How does the image appear in a plane mirror compared to the object?
