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Questions and Answers
What is the primary source of natural light on Earth?
What is the primary source of natural light on Earth?
- Fire
- The Sun (correct)
- The Moon
- Electric lights
What is the speed of light in vacuum?
What is the speed of light in vacuum?
- 750000000 m/s
- 100000000 m/s
- 500000000 m/s
- 299792458 m/s (correct)
Which type of electromagnetic radiation is also considered as light in physics?
Which type of electromagnetic radiation is also considered as light in physics?
- Ultrasonic waves
- Sound waves
- Pressure waves
- Gamma rays (correct)
What are the quanta of electromagnetic field that represent massless elementary particles?
What are the quanta of electromagnetic field that represent massless elementary particles?
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What is the range of wavelengths for visible light as defined in physics?
What is the range of wavelengths for visible light as defined in physics?
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