In the photoelectric effect, what happens when the frequency of incident light i

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Question: In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)

Options:

Correct Answer: Electrons are emitted with higher energy

Exam Year: 2020

Solution:

Increasing the frequency of incident light increases the energy of emitted electrons, as per E = hf.

In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)

In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)

Step 1: Understand that the photoelectric effect involves light hitting a material and causing electrons to be emitted.
Step 2: Know that light can be thought of as made up of particles called photons.
Step 3: Recognize that each photon has energy, which is determined by its frequency (how fast the light waves oscillate).
Step 4: Learn the formula E = hf, where E is energy, h is Planck's constant, and f is the frequency of the light.
Step 5: Realize that if you increase the frequency (f) of the incident light, the energy (E) of each photon also increases.
Step 6: Understand that higher energy photons can cause electrons to be emitted with more energy, meaning they will move faster.

Photoelectric Effect – The phenomenon where electrons are emitted from a material when it is exposed to light of sufficient frequency.
Energy-Frequency Relationship – The relationship defined by the equation E = hf, where E is energy, h is Planck's constant, and f is frequency.