Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
$!$RatJumper$!$:
--- Quote from: Deadly_king on November 11, 2010, 06:01:21 am ---That's right. :D
When it is (n+1)/2, it usually is an odd number. ;)
--- End quote ---
haha no i mean (n+1/2)lambda
birchy33:
--- Quote from: TJ-56 on November 11, 2010, 09:21:45 am ---Well the distance between solid particles and liquid particles are quite similar, but its rather the movement of those particles that differ the most. In gases, the separation of particles are much greater than that of solids and liquids (approximately 10 molecular diameters).
Hope that was helpful and covered your question completely.
--- End quote ---
Hmm I mean in like when you are asked to find the distance between molecules or the RATIO between distance between molecules in a solid compared to a liquid or gas.
astarmathsandphysics:
the ratio is cube root(density of solid/density of gas)
Deadly_king:
--- Quote from: TJ-56 on November 11, 2010, 07:20:30 am ---
Oh ok.
Thanks alot dk.
--- End quote ---
Anytime buddy :)
--- Quote from: $!$RatJumper$!$ on November 11, 2010, 09:28:41 am ---haha no i mean (n+1/2)lambda
--- End quote ---
Oops.........i mistyped it.
The equation is (2n + 1)/2 or n + 1/2.
This equation is only used when the waves meet in anti-phase, i.e there will be maximum destructive interference.
$!$RatJumper$!$:
Alright that makes sense now :) thankx
Ok can you please have a look at S10 P21 Q4b
So, i use y = (D*lambda) / d to find d. Then I did 1 / d to find the answer. I got it right, but then looked at the MS and saw they used d*sin(theta) = n*lambda to find d. Then they did 1 / d to get the answer.
What im confused about is that when are we meant to know what formula to use where?
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