I didn't get you..how exactly??
Say I take unordered pairs(I'll divide the entire thing by 2 in the end)
Now how do I find out how many pairs exist on a chessboard which have only one corner in common?
Ooh yeah..I got it..so how do you suggest I find out the possible cases?
I see now that there are lots of repetitions,so it won't be possible to subtract them..i guess.
So,i think I need a new method.
Homework Statement
2 squares are chosen at random from a chess board.What is the chance that these 2 squares will share exactly 1 corner?
Homework Equations
P=favourable possibilities/Total possibilities
The Attempt at a Solution
So,the total no of possibilities should be 64C2.
Now,for...
Ooo..ok,i got it.
We don't need the Work function because the question already gave us that only 3% OF 4% of the incident energy is already capable of emitting electrons.
I just need to equate 0.12% of incident energy to the energy of the ejected electrons.
Answer's coming
Thanks,both of ya
Homework Statement
Homework Equations
E=hc/lamda
The Attempt at a Solution
I can get the amount of energy incident on the surface (3%of Intensity×Area)
What will be the energy required to make 1 electron escape?
(4.5eV+hc/250nm )?
Then I divide total energy by energy to make 1 electron...
Ok...
But the question just says negative..and nothing about the value.I found your link interesting. .but a few(a lot,actually) of things looked kinda out of my league
I know,I accounted for the given answer in the same way,but only after I had consulted the answer key.Before that,I was thinking about critical angles..and I still can't find the wrong in that.The only criterion for the formula,as I stated earlier,is n1>n2,which is obviously true since n2 is...
Homework Statement [/B]
Homework Equations
Snell's Law:
n1sin(i)=n2sin(r)
Critical angle=sininverse(n1/n2) [**only works when n2>n1]
If a light beam is incident at an interface of 2 mediums(with r.i n1 and n2) at an angle greater than the critical angle,the interface acts as a...