1)Two photons having
a) equal wavelength have equal linear momenta
b)equal energies have equal linear momenta
c)equal frequencies have equal linear momenta
d)equal linear momenta have equal wavelength.
ans (d)
now here if (d) is correct then why (a) is not correct ?
112)A nonmonochromatic light is used in an experiment on photoelectric effect. the stopping potential
ans) is related to the mean wavelength
Why??Please provide a reason or is it a experimental calculation?
49y=x2
in this which is the dependent variable
a) x b) y
c) both d) none
answer to this and question number 1 have same confusion...if u know the answer of this then question number 1 ka answer sirf d kyun hai pata chal jayega!! [1]
113)The collector plate in an experiment on photoelectric effect is kept vertically above a emitter plate. Light source is put on and a saturation photocurrent is recorded. An electric field is switched on which has vertically downward direction
a)the photocurrent will increase
b)the KE of the electrons will increase
c)the stopping potential will decrease
d)the threshold wavelength will increase.
Please provide a reason for your answers
Thanks. [1]
11@ Qwerty,
y = x2
here if we change y then x has to change any way, but if we y remains same for two values of x one is positive and other negative, like 2 and -2 has same answer 4. May be am wrong here, please solve my doubt.
So I said x depends on y here, nahi toh if it would have y = x3, then I agree ki that y is dependent on x.
1see...wavelength comes into play when.....the particle first posses velocity n thus momentum.....so first preference is given to..option d...i hope u hav understood...
1I think it is a question with more than two correct options.As you know de Broglie wavelength is given by y=h/p.So if the two p's are same then two wavelengths are also same.And converse is also true.So both options are correct.It might be a mistake of the book.As there are many mistakes in the book.
11Hey qwerty aka account blocked, I agree that y is dependent on x (tab functions achchhe se nahi kiya tha isliye I gave that stupid answer) Thanks to you.
