記憶度
7問
19問
0問
0問
0問
アカウント登録して、解答結果を保存しよう
問題一覧
1
If the eyeball is too short so image is focused behind the relina, what does the person experience?
Far Sightedness
2
How does ultraviolet (UV) radiation positively impact living organisms, particularly humans?
It enhances vitamin D synthesis in the skin
3
What do we call to the frequency of the EM wave that a station uses?
Carrier wave
4
How can non-ionizing radiation from electronic devices impact the reproductive system in humans?
It can potentially affect sperm quality and reproductive outcomes
5
What practical application involves the use of visible light waves in the field of communication and data transmission?
Fiber-optic communication
6
Which of the following does not belong to the group?
Ions
7
Which type of mirror is commonly used in makeup mirrors due to its ability to produce an upright, magnified image?
Broken Mirror
8
In the EM spectrum, which region has wavelengths longer than visible light but shorter than microwaves?
Infrared
9
How does the ozone layer in the Earth's atmosphere contribute to the protection against harmful effects of ultraviolet UV) radiation?
It absorbs and scatters UV radiation.
10
What image cannot be projected?
Virtual image
11
It is the measure of energy given to the charge flowing in a arcuit
Voltage
12
In a camera, what type of lens is typically used to capture a wide field of view?
Convex Lens
13
How do ionizing radiations, such as X-rays and gamma rays, affect living cells?
They can damage DNA and increase the risk of cancer.
14
How does the operation of an electric motor differ from that of an electric generator?
Motors convert electrical energy to mechanical energy, generators convert mechanical energy to electrical energy.
15
In a camera, what role does the lens aperture play in controlling the amount of light that enters the camera?
Magnification
16
If the eyeball is too long and image focuses in front of the retina, what does the person experience?
Near Sightedness
17
What type of mirror is commonly used in headlights and flashlights to spread light uniformly?
Convex Mirror
18
It is the number of wavelengths that pass a given point in 1s
Frequency
19
Which region of the electromagnetic spectrum is often used in medical imaging, such as CT scans?
X-rays
20
Which color of visible light has the shortest wavelength?
Violet
21
Which of the following is located on the outer edges of atoms?
Electrons
22
Which type of electromagnetic waves are associated with sunbum and can damage skin cells?
Ultraviolet waves
23
It converts sound waves to a changing electric current.
Microphone
24
What is the electromagnetic spectrum?
A range of all possible frequencies of electromagnetic radiation
25
What is a potential health concem associated with prolonged exposure to radiofrequency (RF) radiation from mobile phones and wireless devices?
Possible thermal effects and tissue heating
26
How are visible light waves applied in fiber-optic communication systems?
To produce colors in displays
27
What size image is formed if the real object is placed at the focal point 1?
No image is formed
28
A type of circuit that lined up the components in one path
Series
29
What will happen if the mirror is not flat?
It is always inverted
30
Which of the following is an example of a practical application of microwaves in everyday life?
Cooking in a microwave oven
31
Which component of an atom is positively charged?
lons
32
It has higher frequency than ultraviolet rays and higher wavelength than gamma rays
X-ray
33
What is the main characteristic that distinguishes one color from another in the visible light spectrum?
Wavelength
34
Who is the person who discovered that shining light on a metal caused electrons to be ejected?
Heinrich Hertz
35
What do we call to the lenses that is thicker at the edges and thinner in the center?
Convex
36
Which segment of the electromagnetic spectrum is commonly used for communication purposes, including TV and radio signals?
Radio waves
37
What is the typical orientation formed by a real image?
Inverted
38
Which of the following does not describe a curved mirror?
Light still follows the same rules, with local surface normal
39
What is the main source of ultraviolet radiation in the natural environment?
The Sun
40
It is the distance from crest to crest.
Wavelengin
41
How can we describe the path of light?
Straight-line rays
42
If electrons are stripped away, what happen to the atoms?
Becomes positively charged
43
What happens when light energy does not flow from the image?
Inverted
44
It uses radio waves to diagnose illnesses with a strong magnet and a radig wave emitter and a receiver
MRI
45
Which of the following does not influence resistance?
Texture
46
What type of lens is commonly used in eyeglasses to correct farsightedness?
Convex lens
47
It is the only part of the spectrum that we can see
Visible Light
48
In what way can ultraviolet (UV) radiation impact the DNA of living cells?
It may cause mutations and cell damage.
49
What image is made from real light rays that converge at a real focal point?
Real Image
50
What is a potential consequence of excessive exposure to ultraviolet (UV) radiation from the Sun?
Increased risk of skin cancer