Recent content by Tanishq Nandan

Umm...sorry?? Possible corners of which square? The one which is itself at the corner,the one at the side or the one in the middle?

Oh...so you are saying that just dividing the entire thing by 2 will give my answer?

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

No..i think I mixed up things..

10^-6 Joules per second Ohhk..Then I just equate 3percent of this energy to x times hc /lamda?

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...

Yup..just did it..got the ans..thanks a tonne for bearing with me!

Umm..it's coming 240/7.. Do i need to consider refraction from the lens system again?

oooooooo..idiot..i was given radius.not focal length