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Questions and Answers
Which electromagnetic radiation is usually defined as having wavelengths in the range of 400–700 nanometres?
Which electromagnetic radiation is usually defined as having wavelengths in the range of 400–700 nanometres?
- Microwaves
- Ultraviolet radiation
- Visible light (correct)
- Infrared radiation
What are the primary properties of light?
What are the primary properties of light?
- Energy, mass, velocity, and frequency
- Reflection, refraction, diffraction, and interference
- Intensity, propagation direction, frequency or wavelength spectrum, and polarization (correct)
- Velocity, color, temperature, and amplitude
What is the speed of light in vacuum?
What is the speed of light in vacuum?
- 299,792,458 m/s (correct)
- 200,000,000 m/s
- 300,000,000 m/s
- 400,000,000 m/s
What represents the quanta of electromagnetic field?
What represents the quanta of electromagnetic field?
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What is the main source of natural light on Earth?
What is the main source of natural light on Earth?
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What is the primary purpose of light therapy?
What is the primary purpose of light therapy?
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What is the main component of light used to produce vitamin D3 for treating deficiency?
What is the main component of light used to produce vitamin D3 for treating deficiency?
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Which type of light therapy is commonly used to treat skin conditions such as psoriasis and eczema?
Which type of light therapy is commonly used to treat skin conditions such as psoriasis and eczema?
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As of 2012, what was the evidence for light therapy and lasers in the treatment of acne vulgaris?
As of 2012, what was the evidence for light therapy and lasers in the treatment of acne vulgaris?
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What is the primary difference between narrowband UVB and UVA light from tanning beds in terms of treating skin conditions?
What is the primary difference between narrowband UVB and UVA light from tanning beds in terms of treating skin conditions?
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