8 Questions
Which of the following is a form of electromagnetic radiation?
Light
What is the speed of light in a vacuum?
$3 \times 10^8$ meters per second
Which color of light has the shortest wavelength?
Blue
In which medium does light travel fastest?
Diamond
What property of light determines its color?
Wavelength
Which of the following is a characteristic of light?
Dual nature
What happens to the speed of light when it passes through a material medium?
Decreases
What does the term 'electromagnetic radiation' encompass?
Light
Study Notes
Electromagnetic Radiation
- Electromagnetic radiation includes forms such as X-rays, gamma rays, ultraviolet (UV) radiation, visible light, infrared (IR) radiation, microwaves, and radio waves.
Properties of Light
- The speed of light in a vacuum is approximately 299,792,458 meters per second (m/s) or 186,282 miles per second (mi/s).
Light Characteristics
- Violet light has the shortest wavelength among visible light colors.
- The property of light that determines its color is its wavelength.
- Light is a transverse wave and an electromagnetic wave.
Behavior of Light in Media
- Light travels fastest in a vacuum, and its speed decreases when passing through a material medium, due to interactions with the medium's particles.
- Electromagnetic radiation encompasses the entire spectrum of radiation, from low-frequency, long-wavelength radiation (radio waves, microwaves) to high-frequency, short-wavelength radiation (gamma rays, X-rays).
Test your knowledge about light with this quiz. Answer questions about electromagnetic radiation, speed of light, light wavelength, and the speed of light in different mediums.
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