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what is the question
so when i put all the values in the calc i dont get excat answer as tht
seems to be right
no i mean the answer is right but this is what i get when i put in the excat value
what do you get?
okay lets do by this way.....
multiply by 4.14*3 . and in powers of 10, add -15 and 8, we get -7, isn't it
now 4.14*3 we get 12.4, now divide it by 2.55.
so total we have 4.87 * 10^-7, isn't it? And you have a problem that it is 487, right?
Nanometer is 10^-9, the answer you got was 10^-7, so just some need to do conversion and you get the numbers.
now listen carefully 1nm=10^-9m, right? so,when we have 4.87*10^-7 if we take it to nanometer, 100 is multiplied to 4.87
and 100 is divided in 10th power to make it to nanometer.....
so, you get 487*10^-9, Got it?
is their a single number i can just times by
I didn't get you, single number?
yea like when we have somthing in grams we just divide by 1000 to get in kg
10^-9 is 0.000000001 10^-7 is 0.0000001
in my data shhet i have to h values one in ev and the other in J which one to use?
how know for sho
you can convert and write anyone.... its your choice....
if the question is in ev then i use ev right
But you can use Joules, but it will just become complicated...
i hav e anotehr
i was doing these practive probs but wasnt getting the right answer doww
frequineces required for photoelectron emsiion in 400 THz
ya, i will try ask
wavelength 500nm what is speed if excaping eletrons ?
tell me waht u get for speed
from which orbit are the electrons escaping?
doesnt say anthing else
their was a work funstion 2.65*10^-19
ya work function....
The minimum energy required to make an electron free from the metal is called the work function, right?
okay I got it....... use this
K.E is kinetic energy
so you can get v from here.... rest all data given h,c,lambda,mass of electron and work function
just plug in the values... you will get the answer. Got it?
i tried i didnt get btw what u get
so, do you have the answer with you? I will solve and ask you
9.33 * 10^21
but the process is this way.... well I was of no use... sorry... I did my best....