What happens to the electric field when a charged particle is motionless?

• It becomes a magnetic field.

• It disappears.

• It remains static.

• It varies over time.

Which of the following is NOT a type of electromagnetic wave?

• Sound waves

• Infrared

• Ultraviolet

• Gamma rays

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How do astronomers use electromagnetic waves to observe the universe?

• By using sound waves

• By using gravitational waves

• By using different types of waves

• By using only visible light

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What does the temperature of an object correspond to at the microscopic scale?

• The weight of the object

• The agitation of its atoms

• The size of the object

• The color of the object

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What type of radiation does the human body emit at around 37 degrees Celsius?

• Visible light

• X-rays

• Ultraviolet radiation

• Infrared radiation

What is the term for waves that have a chaotic shape and vibrate in all directions?

• Elliptical waves

• Rectilinear waves

• Non-polarized waves

• Polarized waves

What is the purpose of polarizers in 3D cinema technology?

• To enhance sound quality

• To increase screen brightness

• To project two images simultaneously with different polarizations

• To reduce screen glare

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What is the principle of wave superposition called when two crests add up to form a higher crest?

• Interference

• Reflection

• Diffraction

• Scattering

What phenomenon causes the sky to appear blue?

• Scattering

• Interference

• Refraction

• Reflection

What is the Cherenkov effect used to detect?

• Electrons

• Neutrinos

• Protons

• Photons