hey guys physics cie help .please

[nid404]

I asked my sir, he said uncertainties cannot have more no significant figures than the value itself

[Amr Fouad]

I asked my sir, he said uncertainties cannot have more no significant figures than the value itself

Thats what I exactly said

[*Hope*]

Does any body know what is meant by phase difference?? like the correct definition??
and what is the difference between path and phase difference??

[Amr Fouad]

Does any body know what is meant by phase difference?? like the correct definition??
and what is the difference between path and phase difference??

1) The phase difference between two particles along the wave is the fraction of a cycle by which moves behind the other. Usually expressed in terms of pie

2) Path Difference: Another method of expressing the path difference, but usually expressed in terms of of londa the wavelength.

Equation:
londa ----> 2 x pie

Then use proportion to find the missing term..

Eg: find the path difference when phase difference = 4 x pie

londa-----> 2 x pie
y------> 4 x pie

therefore y= 2 londa

Hope that helped

[nid404]

phase difference= 2pi/ lambda  X path difference

[*Hope*]

Thanks AF and nid
+rep

[cashem'up]

kool thankx...... hey and can someone also help me out wid da other question mentioned on page 1...........please

[halosh92]

oh this is in paper 1 right?
ok u see the minimum number of significant figures in the uncertainity is 2 (if u include the zeros)
so the actual answer is 0.36 but we must round to 2 s.f so we will get 0.4
hope i helped!

how did u get the answer exactly could u show it step by step plz