Understanding Electromagnetic Waves

What is the speed of light in a vacuum?

• 299,792 kilometers per second

• 300,000,000 meters per second

• 299,792,458 meters per second

• 150,000,000 meters per second

How is the speed of light in a medium calculated?

• v = c * n

• v = c/n

• v = n/c

• v = c + n

What does the symbol 'n' represent in the equation v=c/n?

• The speed of light in a vacuum.

• The refractive index of a medium.

• The density of a medium.

• The wavelength of light in a medium.

What type of waves are electromagnetic waves classified as?

• Longitudinal waves

• Surface waves

• Transverse waves

• Mechanical waves

Who first demonstrated the wave nature of light?

• Isaac Newton

• Albert Einstein

• Thomas Young

• James Clerk Maxwell

What phenomenon did Thomas Young use to show the wave nature of light?

• Double-slit experiment

• Total internal reflection

• Refraction of light

• Photoelectric effect

At the beginning of the 20th century, what was concluded about light?

• Light can only be described as a wave.

• Light is solely a particle.

• Light exhibits wave-particle duality.

• Light travels faster in water than in air.

What are the particles of light called?

• quarks

• electrons

• photons

• neutrons

What is the relationship between the energy of a photon and the frequency of the electromagnetic wave?

• The energy of a photon decreases with increasing frequency.

• The energy of a photon increases with increasing frequency.

• The energy of a photon is inversely proportional to frequency.

• The energy of a photon is independent of frequency.

What is the formula that relates the energy of a photon to its frequency?

• E = hf

• E = kT

• E = pλ

• E = mc^2