Physics exam of Sudan 2009
 

Hi this is my 1st subject
You can ask me for any thing any time

thxxxxxxxxxxxxxxxxxxxxxx

thxxxxxxxxxxxxxxxxxxxxxxxxx

:006et4:لو سمحت أنا مش عارفة أوصل لأى توقع من الاسئلة اللى فى المنتدى
شكرا

thaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanks

thankssssssssss

thanxxxxxxxxxxxxxxxx

فيييييييييييييننننننننن مش موججججججججودددد

ألف شكر مع التحية

In problems concerning Prism to know the refractive index ; some books apply the following
n=sin phi one/sin theta one= sin theta two/sin phi two

but sometimes in the answers they apply this law or use n=sin phi two/sin theta two instead of it

why?
and according to what in the problem ? given that the problem give no information to reach this method


2- Chapter 4

what is the mechanism of the U-shaped tube balance ? when we add oil to the water then the oil pushes the water and we take the separating surface .....is this correct meaning?


thanks for ur help

شكراااااااااااااااااا

thanksssssssssssssssssss