1112222222233333
Badges: 0
Rep:
?
#1
Report Thread starter 6 years ago
#1
Please help.
Of the alpha particles that are deflected most are deflected through angles much less than 90° from their original direction.
Explain why, from this observation alone, it is impossible to deduce the sign of the charge on the nucleus.

Thanks
0
reply
atsruser
Badges: 11
Rep:
?
#2
Report 6 years ago
#2
(Original post by 1112222222233333)
Please help.
Of the alpha particles that are deflected most are deflected through angles much less than 90° from their original direction.
Explain why, from this observation alone, it is impossible to deduce the sign of the charge on the nucleus.

Thanks
Try drawing a picture to show the possible directions of deflection when you have:

1) +ve alpha, +ve nucleus
2) +ve alpha, -ve nucleus

In which case is it possible to get a deflection > 90?
0
reply
1112222222233333
Badges: 0
Rep:
?
#3
Report Thread starter 6 years ago
#3
(Original post by atsruser)
Try drawing a picture to show the possible directions of deflection when you have:

1) +ve alpha, +ve nucleus
2) +ve alpha, -ve nucleus

In which case is it possible to get a deflection > 90?
the +ve alpha, +ve nucleus scenario?
0
reply
atsruser
Badges: 11
Rep:
?
#4
Report 6 years ago
#4
(Original post by 1112222222233333)
the +ve alpha, +ve nucleus scenario?
Right. However, what do you notice about the possible deflections in the two cases when the angle < 90?
0
reply
1112222222233333
Badges: 0
Rep:
?
#5
Report Thread starter 6 years ago
#5
Im not sure i understand what you mean
0
reply
atsruser
Badges: 11
Rep:
?
#6
Report 6 years ago
#6
(Original post by 1112222222233333)
Im not sure i understand what you mean
Did you see any similarities between the 2 cases?
0
reply
1112222222233333
Badges: 0
Rep:
?
#7
Report Thread starter 6 years ago
#7
ummmm no?
are you implying that deflection occurs when the nucleus may be -ve??
How can that be?
0
reply
atsruser
Badges: 11
Rep:
?
#8
Report 6 years ago
#8
(Original post by 1112222222233333)
ummmm no?
are you implying that deflection occurs when the nucleus may be -ve??
How can that be?
If the nucleus is -ve, then alpha particles are deflected towards it, but not through > 90 degrees.

If the nucleus is +ve, what range of angles are possible?
0
reply
1112222222233333
Badges: 0
Rep:
?
#9
Report Thread starter 6 years ago
#9
all range of angles are possible. right?
Sorry for being such a pain. I really appreciate your help
0
reply
atsruser
Badges: 11
Rep:
?
#10
Report 6 years ago
#10
(Original post by 1112222222233333)
all range of angles are possible. right?
Yes.

If the nucleus is +ve then we can see scattering angles all the way from 0-180.
If the nucleus is -ve, then we can only see scattering angles less than 90.

So if you are told that we have detected scattering angles less than 90, what does that tell you about the sign of the nucleus?
0
reply
futuredoctorVSB
Badges: 9
Rep:
?
#11
Report 6 years ago
#11
(Original post by atsruser)
Yes.

If the nucleus is +ve then we can see scattering angles all the way from 0-180.
If the nucleus is -ve, then we can only see scattering angles less than 90.

So if you are told that we have detected scattering angles less than 90, what does that tell you about the sign of the nucleus?
What this guy said! Absolutely spot on!
0
reply
1112222222233333
Badges: 0
Rep:
?
#12
Report Thread starter 6 years ago
#12
(Original post by atsruser)
Yes.

If the nucleus is +ve then we can see scattering angles all the way from 0-180.
If the nucleus is -ve, then we can only see scattering angles less than 90.

So if you are told that we have detected scattering angles less than 90, what does that tell you about the sign of the nucleus?
It means it can be both.
Thanks
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Have you experienced financial difficulties as a student due to Covid-19?

Yes, I have really struggled financially (56)
17.39%
I have experienced some financial difficulties (91)
28.26%
I haven't experienced any financial difficulties and things have stayed the same (120)
37.27%
I have had better financial opportunities as a result of the pandemic (44)
13.66%
I've had another experience (let us know in the thread!) (11)
3.42%

Watched Threads

View All