question on how to determine if something has wavelike properties.


Moderators: Chem_Mod, Chem_Admin

sandraabdelmalak1D
Posts: 21
Joined: Wed Nov 16, 2016 3:03 am

question on how to determine if something has wavelike properties.

Postby sandraabdelmalak1D » Tue Jul 11, 2017 6:21 pm

Calculate the de Broglie wavelength of a 0.155 kg ball travelling at 85.0 m.s-1. Can we detect this wavelength or observe the wavelike characteristics of this ball?

I got that the answer is 5.03 x 10^-35 m. I just don't understand how to determine whether something has wavelike properties or not?

Savanna Gharibian 1A
Posts: 29
Joined: Fri Jun 23, 2017 11:39 am
Been upvoted: 1 time

Re: question on how to determine if something has wavelike properties.

Postby Savanna Gharibian 1A » Tue Jul 11, 2017 6:39 pm

You would determine if something has wavelike properties based on the answer you get. Generally things with large mass and large momentum such as traditional objects like cars and balls do not have wavelike properties. I remember asking Dr. Lavelle a similar question and I think he said when you see 10^-18 in your answer that's when you'll know it would be difficult to detect that and also anything smaller. Hope that helps!

Stephanie H
Posts: 20
Joined: Fri Jun 23, 2017 11:39 am

Re: question on how to determine if something has wavelike properties.

Postby Stephanie H » Tue Jul 11, 2017 6:54 pm

Converting the wavelength to nanometers, the wavelength becomes 5.03*10^-26, this is a very small wavelength, therefore we cannot see the wavelike characteristics of the ball. The De Broglie equation relates all matter has wavelike properties. Wavelike properties were discovered by diffraction (the pattern of high and low intensities generated by an object in the path of a light source). Page 17 in the textbook provides a picture of the pattern an electron generated when diffracted.

YashDeshmukh1D
Posts: 42
Joined: Fri Sep 29, 2017 7:05 am

Re: question on how to determine if something has wavelike properties.

Postby YashDeshmukh1D » Wed Oct 11, 2017 10:29 am

Does this mean that even large objects like cars and balls still demonstrate wavelike behavior even though we can't visibly detect it?

Charles Ang 1E
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: question on how to determine if something has wavelike properties.

Postby Charles Ang 1E » Fri Oct 13, 2017 10:45 am

YashDeshmukh1D wrote:Does this mean that even large objects like cars and balls still demonstrate wavelike behavior even though we can't visibly detect it?

I believe it does. However, in one of the peer learning workshops, I recall the UA telling me that the DeBroglie equation generally only works with things that are small. From his statement, I assume that DeBroglie's equation does not apply to large objects.

Wayland Leung
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

Re: question on how to determine if something has wavelike properties.

Postby Wayland Leung » Sun Oct 15, 2017 4:12 pm

I was confused because I remember watching one of Dr. Lavelle's modules and him saying that large objects like baseballs and cars do not have wave-like properties. Only small masses with high velocities have wave-like properties. Could someone please clarify? How do you know if something has measurable wave-like properties?

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: question on how to determine if something has wavelike properties.

Postby Chem_Mod » Mon Oct 16, 2017 11:35 pm

Things will show wave-like properties when the wavelength has somehow close or even larger magnitude than the size of that entity.


Return to “DeBroglie Equation”

Who is online

Users browsing this forum: No registered users and 1 guest