1
Which of the following has the longest wavelength?
2
What type of electromagnetic wave is used in cooking food in a microwave oven?
3
Electromagnetic waves travel at the speed of:
4
Which electromagnetic wave has the shortest wavelength?
5
Which of the following waves has higher energy?
6
What type of wave is used for television broadcasting?
7
Which part of the electromagnetic spectrum is visible to the human eye?
8
What is the main characteristic of electromagnetic waves?
9
Which wave is primarily responsible for sunburn?
10
Electromagnetic waves are classified based on:
11
How does wavelength relate to frequency in electromagnetic waves?
12
Why are X-rays useful in medical imaging?
13
What is the practical use of infrared waves?
14
Which region of the electromagnetic spectrum is mainly used for satellite communication?
15
Why do microwaves heat food?
16
What distinguishes visible light from other electromagnetic waves?
17
Which EM wave is best for sterilizing medical equipment?
18
Why are radio waves ideal for telecommunications?
19
A communication system uses waves with a wavelength of about 1 meter. Which type of electromagnetic wave is this?
20
A remote control uses infrared light to operate. How does this work?
21
A doctor uses X-rays to image bones. If X-rays have a wavelength shorter than visible light, what does this imply?
22
If a radio wave's frequency decreases, what happens to its wavelength?
23
Which EM wave would be suitable for curing food by heating it quickly?
24
How can ultraviolet light be both useful and harmful?
25
Given the following electromagnetic waves: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays—arrange them in order from longest to shortest wavelength.
26
If a new type of wave is discovered with a frequency twice that of visible light but the same speed, what will happen to its wavelength?
27
Compare the practical use of radio waves and gamma rays in terms of safety and application. Which is correct?
28
A hospital must decide between using X-rays or gamma rays for sterilizing equipment. Which should they use and why?
29
Considering environmental concerns, which EM wave application might cause the least harm?
30
Design a new application using electromagnetic waves that could improve daily life. Choose the type of wave, its wavelength or frequency characteristics, and explain its practical use briefly. (Choose the best option)
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Test your knowledge about the 5 seeing habits discussed in the text 'UPS 5 seeing habits'.