## Question 1.3 6th edition

$c=\lambda v$

John_Richey_4A
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

### Question 1.3 6th edition

How would you tell the extent of change in an electrical field at a given point according to a decrease in frequency?

Kate Chow 4H
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

### Re: Question 1.3 6th edition

First, start with the formula E=hv, where E=energy of photon, h=constant, v=frequency. Extent of change in an electrical field is basically the energy of a photon. You are given that frequency (v) decreases and since h is a constant, you know that E (energy of photon) must also decrease.

Hope this helps!

Alma Carrera 3C
Posts: 33
Joined: Fri Apr 06, 2018 11:02 am

### Re: Question 1.3 6th edition

The extent of change is basically the slope of the wave. We know that low frequency is associated with a long wavelength, so if the frequency decreases then the wavelength must increase. If the wavelength increases, that means that the waves have broadened and the slope has decreased. Therefore, the extent of the change has decreased.