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Visible Light and Electromagnetic Radiation Quiz

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Visible Light and Electromagnetic Radiation Quiz

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Questions and Answers

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?

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?

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?

$photons$ (D) Signup and view all the answers

What is the main source of natural light on Earth?

$The Sun$ (A) Signup and view all the answers

What is the primary purpose of light therapy?

Treating medical disorders such as seasonal affective disorder and skin conditions (B) Signup and view all the answers

What is the main component of light used to produce vitamin D3 for treating deficiency?

Wavelengths of 290-390 nanometers (C) Signup and view all the answers

Which type of light therapy is commonly used to treat skin conditions such as psoriasis and eczema?

Narrowband UVB with a wavelength of approximately 311–313 nanometers (B) Signup and view all the answers

As of 2012, what was the evidence for light therapy and lasers in the treatment of acne vulgaris?

Not sufficient to recommend them (C) Signup and view all the answers

What is the primary difference between narrowband UVB and UVA light from tanning beds in terms of treating skin conditions?

Narrowband UVB has a higher percentage of UVB spectrum compared to UVA light from tanning beds (D) Signup and view all the answers