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# 1
Pilihan ganda
What is the speed of electromagnetic waves in a vacuum?
- 3 x 10^8 m/s
- 1.5 x 10^8 m/s
- 9.8 m/s^2
- 2.99 x 10^7 m/s
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# 2
Pilihan ganda
Which of the following is not a type of electromagnetic wave?
- Gamma rays
- X-rays
- Sound waves
- Radio waves
# 3
Pilihan ganda
Who developed the theory of electromagnetic waves?
- Isaac Newton
- James Clerk Maxwell
- Albert Einstein
- Nikola Tesla
# 4
Pilihan ganda
What is the frequency range of visible light in the electromagnetic spectrum?
- 400 - 700 nm
- 700 - 1000 nm
- 10 - 400 nm
- 1000 - 7000 nm
# 5
Pilihan ganda
Which electromagnetic waves have the longest wavelength?
- Gamma rays
- X-rays
- Microwaves
- Radio waves
# 6
Pilihan ganda
What is the primary use of infrared radiation?
- Medical imaging
- Heating and night-vision
- Communication satellites
- UV sterilization
# 7
Pilihan ganda
Which part of the electromagnetic spectrum is used for sterilizing medical equipment?
- Visible light
- Ultraviolet light
- Radio waves
- Microwaves
# 8
Pilihan ganda
What is the principle behind the operation of a microwave oven?
- Reflection of light
- Emission of gamma rays
- Induction of heat
- Dielectric heating
# 9
Pilihan ganda
Which type of electromagnetic waves are used in fiber optic communication?
- Infrared
- Ultraviolet
- Gamma rays
- X-rays
# 10
Pilihan ganda
How does the wavelength of electromagnetic waves relate to their energy?
- Longer wavelength means higher energy
- Shorter wavelength means lower energy
- Longer wavelength means lower energy
- Wavelength does not affect energy
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