Chapter 6.2, Problem 4CP

Interpretation Introduction

Interpretation:

The correct increasing order of wavelengths for the light is to be determined out of the four given options.

Concept introduction:

Einstein utilizes Planck’s theory to explain the photoelectric effect according to which electrons are transmitted when a light of a certain frequency, called threshold frequency, falls on a metal surface.

Higher the frequency of light, higher the kinetic energy of the ejected electrons.

The energy of the electrons is calculated by the expression as follows: $\begin{array}{c}E=h\nu \\ =\frac{\text{hc}}{\lambda }\end{array}$

Here, $\lambda$ is the wavelength of the radiation, c is the speed of light, h is the Planck’s constant, and $E$ is the energy of the electrons.

Wavelength is the separation between two progressive crests or troughs or it is distance between identical points on successive waves.

Frequency is the number of waves passing through a point per second. It is represented by $\nu$.

Amplitude is the separation estimated from the middle of the peak to the top of the crest or bottom of the trough.

Wavelength and frequency are inversely proportional to each other. $\lambda \propto \frac{1}{\nu }$.