snells law - physics (1 Viewer)

[choco-holly-24]

i have my prelim prac exam for physics tomorrow and i need to no snells law
i no what it is but i dont no what to do with it...

cant someone please help?

 

[Heliotrope]

Can you tell me what Snell's Law is? I probably need to know it...

 

[choco-holly-24]

its n = angle of incidence over angle of refraction
but what are u sposed to use it for??????????????

 

[Heliotrope]

Thanks. Um... possibly to calculate the value of angles?

 

[choco-holly-24]

i no laws but im really bad at knowing when to us what one...

gahhhhh

 

[Vars5]

snell's law

sin(i)/sin(r) = v1/v2 = n2/n1 = wavelength(1) / wavelength (2)

i = angle of incidence

r = angle of refraction

n= refractive index of medium

1 - refers to medium one

2 - refers to medium two

Special Case when r=90 also known as the critical angle.

sub r=90 giving sin90 = 1

 

[sle3pe3bumz]

no offense, but I thought I was bad at physics .. did you touch on snells law in class? For me it was one of the easiest things to learn ..

but yeah, I think I find the few topics we did this terms a bit confusing seeing as though we had to rush through them ..