Understanding the Photoelectric Effect

What is the photoelectric effect best described by?

• Light as a particle

• Light as a wave

• Light as a sound

• Light as a magnetic field

Which color of light can dislodge electrons from a metal surface regardless of its intensity?

• Green light

• Red light

• Yellow light

• Blue light

According to classical electromagnetic theory, what should affect the emission of electrons?

• The speed of the light

• The color of the light

• The frequency or amplitude of the light

• The temperature of the metal

What is the term for the minimum frequency needed to dislodge electrons from a metal surface?

• Maximum frequency

• Base frequency

• Threshold frequency

• Critical frequency

Who proposed the idea that light energy comes in discrete packets?

• Albert Einstein

• Isaac Newton

• James Clerk Maxwell

• Niels Bohr

What is the equation that describes the energy of a photon?

• E = hν

• E = hf

• E = mc^2

• E = mv^2

What constant is used in the equation for photon energy?

• Boltzmann's constant

• Newton's constant

• Avogadro's number

• Planck's constant

How does increasing the frequency of light affect the energy of photons?

• It increases the energy

• It doubles the energy

• It has no effect on the energy

• It decreases the energy

Why can't high-intensity red light dislodge electrons from a metal surface?

• Red light is absorbed by the metal

• Red light photons have insufficient energy

• Red light is reflected by the metal

• Red light is too fast

What happens when the frequency of light is increased to blue light?

• Photons lose energy

• Photons disappear

• Photons remain unchanged

• Photons gain energy