A changing electric field induces a magnetic field, a changing magnetic field induces a current

EM radiation is caused by rapidly oscillating electrical charges

 

 

 

 

 

 

You're a twin Smiley? I did not know that...

surprise!

Identical twins?

thank god not

Would it be so bad?

People seem to have a hard enough time telling us apart now, not that we look particularly similar

People get my sister and me confused and we're not that alike

I have three siblings and we all look the same

*radiates*

the magnetic and electric fields are in phase

What can I get/make cheaply that will still make nice presents...

Wine

*radiates*

 

*tests half-life*

That's what my dads getting for his birthday anyway, he's not difficult to buy for

if a EM wave travels over an electron that electron will oscillate in the same way that the electron which propagated the wave moved

*clicks at a geiger counter*

polaroids only allow light to pass in one plane, two polaroids on top of each other at 90 degrees should block out all light

I'm sure I heard somewhere that if you put a third filter inbetween them at 45 degrees then some light can get through...

 

What can I get/make cheaply that will still make nice presents...

Wine

I'm sure they wouldn't be complaining

diffraction is the bending of waves around objects in their path

 

I'm sure I posted this a couple days ago

Every point on a wave-front may be considered as a new source of circular wavefronts

I'm prolly going blind then

huygen's principle

I'm prolly going blind then

 

or just losing your memory in your old age :P

Waterstones randomly gave me and my friend some free books once

Sound waves are easily diffracted through openings like doors as they have long wavelengths so can be affected by the large slit of a door, unlike light

 

 

I'm prolly going blind then

or just losing your memory in your old age :P

*clutches hair and sings desperately*

My friend has a 20th birthday event on fb and somebody posted something like Omg that's halfway to 40 and so we all had a mass panic

Is scary