Quantum equations


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505316964
Posts: 95
Joined: Thu Jul 11, 2019 12:17 am

Quantum equations

Postby 505316964 » Sat Oct 19, 2019 12:00 pm

Is velocity usually in nm or m? does it matter when using the equations if the question doesn't specify units?

serenabirkhoff_1K
Posts: 63
Joined: Sat Aug 17, 2019 12:15 am

Re: Quantum equations

Postby serenabirkhoff_1K » Sat Oct 19, 2019 12:05 pm

The unit of the de Broglie wavelength is meters (m) so when using his formula I think it should be in m but after solving you can convert to nm for the answer if it asks.

Naji Sarsam 1F
Posts: 104
Joined: Sat Aug 17, 2019 12:18 am

Re: Quantum equations

Postby Naji Sarsam 1F » Sat Oct 19, 2019 12:08 pm

In all of the equations used for the Quantum Mechanics unit, distance must be converted to meters. After a calculation is done, the problem may ask for a unit different than meters, such as Angstrom or nanometers. Only convert to these units after the calculation is complete, never before.

Lindsey Chheng 1E
Posts: 110
Joined: Fri Aug 30, 2019 12:16 am

Re: Quantum equations

Postby Lindsey Chheng 1E » Sat Oct 19, 2019 12:09 pm

505316964 wrote:Is velocity usually in nm or m? does it matter when using the equations if the question doesn't specify units?

velocity is usually in m/s

BritneyP- 2c
Posts: 101
Joined: Sat Sep 14, 2019 12:15 am

Re: Quantum equations

Postby BritneyP- 2c » Sat Oct 19, 2019 2:07 pm

I think typically in the test they say what units o put the answer in but m/s is always safe.

HuyHa_2H
Posts: 100
Joined: Wed Sep 11, 2019 12:15 am

Re: Quantum equations

Postby HuyHa_2H » Sat Oct 19, 2019 2:37 pm

Honestly, any unit of distance in the metric system per a unit of time is fine because they can all be converted anyway, but normally people write it as m/s or maybe unless otherwise stated.


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