Particle Nature of Light Quiz

What is the nature of light according to the previous lecture?

• Gas

• Waves

• Solid

• Particles

What are the electric and magnetic waves of light perpendicular to?

• The ground

• Each other

• The source of light

• The direction of travel

What is the momentum of electromagnetic waves related to?

• Speed

• Wavelength

• Amplitude

• Frequency

Who proposed the concept of light as little packets called quanta?

• Niels Bohr

• Max Planck

• Albert Einstein

• Isaac Newton

What is the energy of each photon of light related to?

• Speed

• Wavelength

• Amplitude

• Frequency

How many photons per second enter the eye on a moonlit night?

• 5 x 10^8

• 5 x 10^9

• 5 x 10^10

• 5 x 10^11

What happens when an electron drops from a higher energy state to a lower energy state?

• It absorbs a photon

• It becomes neutral

• It disappears

• It emits a photon

What phenomenon is observed in materials that continue to emit light of a different color even after the light source is turned off?

• Absorption

• Fluorescence

• Refraction

• Reflection

What does LASER stand for?

• Light Absorption by Solar Energy Refraction

• Light Amplification by Stimulated Emission of Radiation

• Luminous Absorption by Stimulated Emission of Radiation

• Luminous Amplification by Solar Energy Reflection

What is the process called when atoms are excited to a high energy level in a laser?

• Photon Emission

• Atomic Excitation

• Optical Pumping

• Energy Conversion