Dual Nature of Light Quiz

Heinrich Hertz used properties of which type of wave to support the idea that light is also made of waves?

• infrared

• gamma

• microwave

• radio

Which observation supports the idea that light is made of particles?

• Light is produced by the interaction of magnetic and electric fields.

• Light spreads out after passing through an opening.

• Light diffracts when it hits a barrier.

• Light moves in a straight path.

Which best explains how the diffraction pattern observed in Young’s experiment supports the wave theory of light?

• The pattern was caused by light moving in a straight path.

• The pattern was caused by light being separated into colors.

• The pattern was caused by the interference of waves.

• The pattern was caused by the reflection of waves.

How does refraction support the particle theory of light?

• Particles bounce off surfaces similar to the way in which a ball bounces off a wall.

• Light slows down and bends when it moves from a less dense to a more dense medium.

• Forces act on the particles to push or pull them from one medium to another.

• As light passes through an opening, it spreads out in all directions.

Wilam made a chart to summarize the results of experiments with the photoelectric effect. Which best describes how to correct Wilam’s error?

• The first result should state that frequencies of light that were lower than the frequency threshold of the metal could not eject electrons.

• The second result should state that as soon as light struck the metal, protons were ejected.

• The second result should state that just before light struck the metal, electrons were ejected.

• The third result should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons.

What is the smallest packet of electromagnetic energy that can be absorbed or emitted?

• a proton

• an electron

• a photon

• a wave

Which theory was contradicted by experiments with the photoelectric effect?

• Light spreads out after it passes through a small opening.

• As soon as light strikes metal, electrons will be ejected.

• Visible light, regardless of color, will cause the ejection of electrons when striking metal.

• The kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Which describes a relationship when calculating the energy of a photon?

• The energy of the photon is directly proportional to frequency.

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

• As the energy of the photon increases, Planck’s constant increases.

• As the energy of the photon increases, Planck’s constant decreases.

One quantum particle is in the same position as another quantum particle. Which of the following principles is this an example of?

• principle of uncertainty

• principle of superposition

• principle of the duality of light

• principle of the polarization of waves

Which of the following would most benefit from quantum computing?

• animating cartoons

• running a cash register

• protecting a device from a cyberattack

• determining the colors found in a rainbow