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Questions and Answers
What property of light allows it to be perceived by the human eye?
What property of light allows it to be perceived by the human eye?
- Its charge
- Its speed
- Its mass
- Its wavelength (correct)
Which phenomenon describes the bending of light as it passes from one medium to another?
Which phenomenon describes the bending of light as it passes from one medium to another?
- Reflection
- Refraction (correct)
- Diffraction
- Absorption
What is the primary source of natural light on Earth?
What is the primary source of natural light on Earth?
- The Moon
- Stars
- The Sun (correct)
- Electricity
Which type of electromagnetic radiation has a longer wavelength than visible light?
Which type of electromagnetic radiation has a longer wavelength than visible light?
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What is the speed of light in a vacuum?
What is the speed of light in a vacuum?
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Study Notes
Light Perception
- The human eye perceives light due to its electromagnetic radiation properties.
- Electromagnetic radiation is a form of energy that travels in waves.
Refraction
- Refraction is the bending of light as it passes from one medium to another.
- This occurs because light travels at different speeds in different mediums.
Source of Natural Light
- The Sun is the primary source of natural light on Earth.
- This light travels through space as electromagnetic radiation and reaches Earth.
Infrared Radiation
- Infrared radiation has a longer wavelength than visible light.
- It is invisible to the human eye but can be detected as heat.
Speed of Light
- The speed of light in a vacuum is approximately 299,792,458 meters per second.
- This is often rounded to 300,000,000 m/s for convenience.
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