Midterm #2 question 4a,b

Jimmy lira-1G
Posts: 61
Joined: Fri Apr 06, 2018 11:03 am

Midterm #2 question 4a,b

For question 4 on Midterm 2 it asks to find the wavelength of the ejected electron, which I knew how to do; however 4b asks "can the wavelike properties of ejected electrons in part A be detected?" and this question threw me off can someone explain the conceptual answer to this question; does it relate to the speed of light at all? That's the only thing I could think of to answer this question
-Jimmy Lira 1G

Miya Lopez 1I
Posts: 62
Joined: Tue Nov 14, 2017 3:00 am
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Re: Midterm #2 question 4a,b

I'm not sure if this is correct, but I think part b is asking if the wavelength is too small to be detected. So you would just have to see if your final answer is a very very small number.

Bianca Nguyen 1B
Posts: 36
Joined: Fri Apr 06, 2018 11:04 am

Re: Midterm #2 question 4a,b

Miya is right. I believe the cutoff is 10^-18 for the wavelength. If the wavelength is smaller than that, as is the wavelength for objects such as a ball or a car, then wavelength properties cannot be detected, and that is why we say that these objects do not have wavelength properties.

Jennifer 1G
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Joined: Wed Nov 15, 2017 3:03 am

Re: Midterm #2 question 4a,b

I suggest watching the video module on this topic! I believe it was mentioned that the wavelength could be detected up to the negative 12 or 15 power, but I'm not exactly sure if an exact value was said.

Kuldeep Gill 1H
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Re: Midterm #2 question 4a,b

Hi, I remember hearing in class that it was 10^-18. I'm not sure if you remember but in lecture, we did practice problems where the wavelength was something like 10^-31 and we came to the conclusion that because it was so small we would not be able to detect it. Hope that helps!

Pritish Patil 1K
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Joined: Fri Sep 28, 2018 12:24 am

Re: Midterm #2 question 4a,b

The question is essentially asking if the wavelength of the ejected electron is too small to be detected. I'm pretty sure this means is it smaller than 10^-18 power.

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