U3L1 - Post Quiz - Light and Quantized Energy

What is the photoelectric effect?

• A phenomenon where electrons are emitted from a metal's surface when light of a certain frequency shines on it.

• A process where light is absorbed by a metal, causing it to heat up.

• A reaction where metals change color when exposed to ultraviolet light.

• An effect where light waves are bent when passing through a prism.

What is the relationship between frequency and energy of light?

• The energy of light is inversely proportional to its frequency; higher frequency light has less energy.

• The energy of light is directly proportional to its frequency; higher frequency light has more energy.

• The energy of light is independent of its frequency; frequency does not affect energy.

• The energy of light is equal to its frequency multiplied by a constant factor.

What is the significance of the quantum theory?

• Quantum theory explains the behavior of matter and energy on very small scales, such as atoms and subatomic particles.

• Quantum theory is primarily concerned with the motion of planets and celestial bodies.

• Quantum theory states that energy can be created and destroyed in large quantities.

• Quantum theory is a theory that only applies to macroscopic objects.

What is the electromagnetic spectrum?

• The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, radio waves, and X-rays.

• The electromagnetic spectrum is a type of sound wave that can be heard by humans.

• The electromagnetic spectrum refers to the different colors of light visible to the human eye.

• The electromagnetic spectrum is a measure of the speed of light in a vacuum.

What is a photon?

• A particle of light that carries energy and has no mass.

• A type of electromagnetic wave that has mass.

• A subatomic particle that makes up atoms.

• A form of energy that can be seen but not measured.

Define wavelength.

• Wavelength is the distance between successive crests of a wave.

• Wavelength is the speed of a wave divided by its frequency.

• Wavelength is the amplitude of a wave measured from its equilibrium position.

• Wavelength is the time taken for one complete wave cycle to pass a given point.

True or False: Rutherford's model explains how electrons are arranged around the nucleus.

• True

• False

• Partially true

• Not enough information

What happens to light when it passes through a medium?

• It is always reflected.

• It can be refracted, reflected, or absorbed.

• It travels faster than in a vacuum.

• It changes color.

What is the role of electrons in chemical bonding?

• Electrons are responsible for the physical properties of substances.

• Electrons play a crucial role in chemical bonding by being shared or transferred between atoms to form molecules.

• Electrons are only involved in the formation of ionic bonds.

• Electrons do not participate in chemical reactions.

What is the formula for calculating energy of a photon?

• E = mc^2

• E = hf

• E = mv^2

• E = 1/2 kx^2