Wavelength unit conversion


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Stephen Sirmay 1I
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Joined: Fri Sep 28, 2018 12:21 am
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Wavelength unit conversion

Postby Stephen Sirmay 1I » Fri Oct 19, 2018 11:31 am

When calculating wavelength using the formula wavelength= h/(mass x velocity), I'm uncertain what units my given mass should be? I noticed that the Joules contains the units kg, so would that mean my mass needs to be in units of kg to cancel out, resulting in a end result unit of wavelength mass? Or does it not matter at all?

Christine Chen 1H
Posts: 64
Joined: Fri Sep 28, 2018 12:18 am

Re: Wavelength unit conversion

Postby Christine Chen 1H » Fri Oct 19, 2018 12:26 pm

Mass needs to be in kg to cancel out! The only time you would use grams is for molar mass conversions. Other than that, use kg.

Rachel Dang 1H
Posts: 32
Joined: Fri Sep 28, 2018 12:17 am

Re: Wavelength unit conversion

Postby Rachel Dang 1H » Fri Oct 19, 2018 1:52 pm

Yup, whenever doing calculations involving units make sure you have ones that allow you to cancel out what you don't need while ending up with the correct units for your answer. So yes in that case you would need mass in kg.

Madeline Lequang 1G
Posts: 30
Joined: Fri Sep 28, 2018 12:27 am

Re: Wavelength unit conversion

Postby Madeline Lequang 1G » Fri Oct 19, 2018 2:47 pm

What's the ratio of kg in a joule for the conversion?

Jovian Cheung 1K
Posts: 48
Joined: Fri Sep 28, 2018 12:16 am

Re: Wavelength unit conversion

Postby Jovian Cheung 1K » Fri Oct 19, 2018 2:52 pm

1 joule = 1 kg•m2•s-2 in SI units! :o)


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