Consider an electromagnetic wave coming from the sun...

Name: consider an electromagnetic wave coming from the sun straight down to the earth if a magnetic field vector b oscillates in the eastwest direction then the nature of the wave should be 74272
Uploaded: 2022-06-23T08:31:31-08:00
Duration: 4 min 1 s
Channel: Gokul R Nair
Description: consider an electromagnetic wave coming from the sun straight down to the earth if a magnetic field vector b oscillates in the eastwest direction then the nature of the wave should be 74272

Consider an electromagnetic wave coming from the Sun straight down to the Earth. If a magnetic field vector B oscillates in the east–west direction, then the nature of the wave should be _______ with the electric vector E oscillating along the:

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Transcript

0:00 So let's start with the problem.

00:01 We have been told to find the direction of electric field.

00:04 We have been told that em wave is propagating from east to west.

00:09 Okay.

00:10 So that actually means that em wave is in west direction.

00:14 Okay.

00:15 And we have been told that at any point magnetic field is vertical.

00:19 Vertical means like this.

00:21 This is vertical.

00:22 This is horizontal.

00:23 And its orientation is downwards.

00:25 Downwards means like this.

00:27 Okay.

00:27 So downwards like this.

00:29 Okay.

00:29 So we have been told to find what is the orientation of e you know direction of magnetic field will be the direction of cross product of e and b okay so we will be finding the how do we find the direction of cross product by using right hand thumb rule okay we keep it along one vector and we curl our fingers towards the other vector okay like this if we have a we keep our hands like this and we curl it like this and thumb gives the direction of a cross b.

01:03 Okay, that's how we do.

01:05 So here we have b in this direction, okay? and this is the direction of em wave...

Question

Consider an electromagnetic wave coming from the Sun straight down to the Earth. If a magnetic field vector B oscillates in the east–west direction, then the nature of the wave should be _______ with the electric vector E oscillating along the:

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