Speed of light constant


Moderators: Chem_Mod, Chem_Admin

paulacamara1E
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Speed of light constant

Postby paulacamara1E » Sun Apr 15, 2018 11:21 pm

When reviewing the properties of light Dr. Lavelle gave as the constant c as 3.00 x 10ˆ8 m/s. I understand that this constant will always be given and that it is part of a formula but I was quite confused as to which type of problem/when would we use this constant?

404975170
Posts: 68
Joined: Thu Jul 27, 2017 3:00 am

Re: Speed of light constant

Postby 404975170 » Sun Apr 15, 2018 11:27 pm

this is the speed of light in a vacuum so this constant is wavelength x frequency

Chem_Mod
Posts: 17520
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 393 times

Re: Speed of light constant

Postby Chem_Mod » Sun Apr 15, 2018 11:27 pm

You will see this constant in the wave equations f=c/λ which relates wavelength and frequency. If given frequency of an electromagnetic wave and asked to find the wavelength, then you would use the speed of light constant.

Taizha 1C
Posts: 36
Joined: Fri Apr 06, 2018 11:01 am

Re: Speed of light constant

Postby Taizha 1C » Mon Apr 16, 2018 12:38 am

Do we need to memorize the speed of light in different conditions for the exam?

Jennifer Ma 1G
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Re: Speed of light constant

Postby Jennifer Ma 1G » Mon Apr 16, 2018 9:13 am

Taizha 1C wrote:Do we need to memorize the speed of light in different conditions for the exam?


I believe that such constants will be given to us on the exam.

Komal Prakash 1H
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am
Been upvoted: 1 time

Re: Speed of light constant

Postby Komal Prakash 1H » Wed Apr 18, 2018 9:10 pm

The speed of light constant, c, will be provided to us as previously mentioned and can be used in a variety of problems. We recently have also begun to conduct calculations using E= h x v as well as En= (-h x R)/(n^2). These questions often give us energy levels that electrons transition from and require us to find wavelength. Since the equation c=wavelength x frequency is needed for wavelength, we would need to use c in these types of problems as well.


Return to “Properties of Light”

Who is online

Users browsing this forum: No registered users and 2 guests