71
rajat jain d)none
infinity .. since the block was initially in equilibrium no force will act on it in vertical direction at outset..Upvote·0· Reply ·2012-11-15 05:19:18
Intensity and exact wavelength of the lines in the spectrum of an element depends upon ?
a) temperature
b) Pressure
c) Pressure of Electric Field,magnetic field and motion of source
d) None
e) All
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5 Answers
71211)
a)True.We know that spectral lines correspond to particular energy(hence frequency).Wavelength(and speed) depend on the refractive index,which depends on temp.,pressure.
b)True.Same reason as above.
c)True.Due to stark and zeeman effect,the orientation of orbitals change and hence the spectrum will change.
Motion of source will also change wavelength due to doppler effect.
Hence
e)all(i hope it did not include none.)
212)ans:d)None
Initial radius should be b.
Now,we know that due to the existence of centrifugal force radius should increase.hence either A) or D) are correct.But suppose A is true then consider μ=3/4.Inc. is to large to be true.
71thanks. For the first one, I didn't go all upto the wavelength dependence things.
For second one, I do not know the answer and don't have the solution that's why I posted it here. I do not have a very clear idea on how to go on solving this radii kind of stuff. So I was unsure.
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