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Chapter 36: Problem 3

To have a larger photocurrent, which of the following should occur? (select all the correct changes) a) brighter light c) higher frequency b) dimmer light d) lower frequency

Short Answer

Expert verified
Answer: a) Brighter light, c) Higher frequency

Step by step solution

01

Option a: Brighter light

When the light is brighter, there are more photons (light particles) interacting with the material. This means that more electrons will be energized, which in turn will lead to a larger photocurrent. So, a brighter light increases the photocurrent.
02

Option b: Dimmer light

A dimmer light will result in fewer photons interacting with the material. As a result, there will be fewer electrons energized, leading to a smaller photocurrent. Therefore, a dimmer light will not lead to a larger photocurrent.
03

Option c: Higher frequency

Higher frequency light has more energy per photon, as energy is directly proportional to the frequency (E = hf, where E is energy, h is Planck's constant, and f is frequency). With more energy, the photons can energize more electrons, leading to a larger photocurrent. So, a higher frequency light will lead to a larger photocurrent.
04

Option d: Lower frequency

Lower frequency light has less energy per photon. This means that fewer electrons will be energized, leading to a smaller photocurrent. Thus, a lower frequency light will not lead to a larger photocurrent. The correct changes to increase photocurrent are: a) Brighter light c) Higher frequency

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