Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 17: Problem 2371

If intensity of incident light is increased, ........of photo electrons will increase. (A) number (B) Frequency (C) energy (D) wavelength

Short Answer

Expert verified
When the intensity of incident light is increased, the \(number\) of photo electrons will increase, not their frequency, energy, or wavelength. The correct answer is (A) number.

Step by step solution

01

Understanding the Photoelectric effect

The Photoelectric effect is the phenomenon of the emission of electrons from a material, typically a metal, when it is exposed to light. In this effect, the energy of the incident light is transferred to electrons in the material. It's crucial to understand that the energy of each individual photon of light is given by the equation \(E = hf\), where \(h\) is Plank's constant and \(f\) is the frequency of light. This means that the energy of each photoelectron (which is an electron that has absorbed the energy of a light photon) is dependent on the frequency of the incoming light, not its intensity.
02

Effect of increasing the intensity of light

The intensity of light is basically a measure of the number of photons coming from the light source per unit time. Thus, increasing the intensity means increasing the number of photons that are incident on the material per unit time. Each of these photons can potentially interact with an electron in the material and give it enough energy to escape, thereby increasing the number of photoelectrons.
03

Understanding the characteristics of photoelectrons

However, it's important to note that while the number of photoelectrons will increase, the energy, frequency, and wavelength of each individual photoelectron does not change with an increase in light intensity. These characteristics are only changed by altering the frequency of the incoming light, as shown by the equation \(E = hf\).
04

Conclusion

So, when the intensity of incident light is increased, the "number" of photo electrons will increase, not their frequency, energy or wavelength. This means that the correct answer is (A) number.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

At \(10^{\circ} \mathrm{C}\) temperature, de-Broglie wave length of atom is $0.4 \AA\(.If temperature of atom is increased by \)30^{\circ} \mathrm{C}$, what will be change in de-Broglie wavelength of atom? (A) decreases \(10^{-2} \AA\) (B) decreases \(2 \times 10^{-2} \AA\) (C) increases \(10^{-2} \AA\) (D) increases \(2 \times 10^{-2} \AA\)

Matching type questions: (Match, Column-I and Column-II property) Column-I Column-II (A) Planck's theory of quantum (p) Light energy \(=\mathrm{hv}\) (B) Einstein's theory of quanta (q) Angular momentum of electron in an orbit. (C) Bohr's stationary orbit (r) Oscillator energies (D) D-Broglie waves (s) Electron microscope (A) \((\mathrm{A}-\mathrm{p}),(\mathrm{b}-\mathrm{q}),(\mathrm{C}-\mathrm{r}),(\mathrm{D}-\mathrm{s})\) (B) \((\mathrm{A}-\mathrm{q}),(\mathrm{B}-\mathrm{r}),(\mathrm{C}-\mathrm{s}),(\mathrm{D}-\mathrm{p})\) (C) \((\mathrm{A}-\mathrm{r}),(\mathrm{B}-\mathrm{p}),(\mathrm{C}-\mathrm{q}),(\mathrm{D}-\mathrm{s})\) (D) \((\mathrm{A}-\mathrm{r}),(\mathrm{B}-\mathrm{p}),(\mathrm{C}-\mathrm{s}),(\mathrm{D}-\mathrm{q})\)

Which of the following phenomenon can not be explained by quantum theory of light? (A) Emission of radiation from black body (B) Photo electric effect (C) Polarization (D) Crompton effect

Matching type questions: (Match, Column-I and Column-II property) Column-I Column-II (A) Particle nature of light (p) Davisson and Germes (B) Wave nature of light (q) G. P. Thomson (C) Wave nature of slow moving electrons (r) Max. Planck (D) Wave nature of fast moving electrons (s) Huygens (A) \((\mathrm{A}-\mathrm{p}),(\mathrm{B}-\mathrm{q}),(\mathrm{C}-\mathrm{r}),(\mathrm{D}-\mathrm{s})\) (B) \((\mathrm{A}-\mathrm{q}),(\mathrm{B}-\mathrm{r}),(\mathrm{C}-\mathrm{s}),(\mathrm{D}-\mathrm{p})\) (C) \((\mathrm{A}-\mathrm{r}),(\mathrm{B}-\mathrm{s}),(\mathrm{C}-\mathrm{p}),(\mathrm{D}-\mathrm{q})\) (D) \((\mathrm{A}-\mathrm{s}),(\mathrm{B}-\mathrm{r}),(\mathrm{C}-\mathrm{q}),(\mathrm{D}-\mathrm{p})\)

The cathode of a photoelectric cell is changed such that the work function changes from \(\mathrm{W}_{1}\) to \(\mathrm{W}_{2}\left(\mathrm{~W}_{2}>\mathrm{W}_{1}\right)\). If the currents before and after change are \(\mathrm{I}_{1}\) and \(\mathrm{I}_{2}\), all other conditions remaining unchanged, then assuming $\mathrm{hf}>\mathrm{W}_{2} \ldots \ldots$ (A) \(\mathrm{I}_{1}=\mathrm{I}_{2}\) (B) \(I_{1}\mathrm{I}_{2}\) (D) \(\mathrm{I}_{1}<\mathrm{I}_{2}<2 \mathrm{I}_{1}\)
See all solutions

Recommended explanations on English Textbooks

Blog

Read Explanation

Language Analysis

Read Explanation

Listening and Speaking

Read Explanation

International English

Read Explanation

Free Response Essay

Read Explanation

Email

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free