Energy from Wavelength: Electromagnetic Radiation Calculation

Learn an EASY way to calculate the energy of a specific wavelength of electromagnetic radiation.

[@seydaguroglu6465]

Thank you so much for posting this Anne! Such a quick and easy explanation!

[@AnneSchmidt]

Thanks! That’s outstanding to hear.

[@shawncaradine6016]

This video was nothing short of helpful. Many thanks!

[@AnneSchmidt]

Wonderful to hear my video was helpful! Thanks 😊

[@ariiblink]

Soo easy to follow thank you for the video now I understand!! Also love the Lego figures :)

[@AnneSchmidt]

Romina S fantastic! Great to hear the video was helpful.

[@kirstenholder7270]

This was very helpful, Thank you!!

[@AnneSchmidt]

Kirsten Holder yay 😁

[@darthsauron8052]

You are an absolute lifesaver, thank you so much!

[@AnneSchmidt]

It’s wonderful to hear that my video was so helpful.

[@user-vl9jt4ox1e]

Hello can i ask, how did you get the 4.1×10 raise to negative 7 m?

[@AnneSchmidt]

You have to convert your nanometers to meters. 410 nm is 4.10×10 to the -7th m. That’s because there are 1,000,000 nm in 1 m

[@lexstenger7252]

I was wondering why you set up the conversion going from J to Kj differently than the Nm to meters What I mean by that is for the Nm you put the big number on the bottom with Nm but the one going from J to Kj you put the big number with the J rather than the Kj. Why is that?

[@AnneSchmidt]

1 KJ = 1000 J 1 m = 1,000,000,000 nm I never use decimals and always have the 1 with the larger metric unit and then have the smaller metric unit in 10's more

[@TPXdude]

im confused how you combined the equations and isolated them..

[@eliasmukdissi8646]

If you’re trying to find a mole of a spectrum do you follow the same path then multiply my avogrados number?

[@AnneSchmidt]

You got it! That way you have the energy for a mole of photons.

[@user-qt8qt1ns6s]

pls can u explain how u converted the 410nm to 4.1 x 10m

[@Edison-dp7gr]

bc a meter is a billion nm, she converted 410 nm to that amount to meters which happen to be 4.2 x 10^-7

[@AnneSchmidt]

Thanks for the correct response!

[@hunterx2501]

when did v become frequency?pls explain

[@hunterx2501]

sorry i am only in junior high...

[@AnneSchmidt]

Chemists use v (which is actually a Greek letter called nu) for frequency. In physics they may use f for frequency. The letter f in chemistry could also be a type of orbital which is why it isn’t used for frequency.

[@hunterx2501]

thx😁

[@user-xq1mg2vc2y]

how did you get 10 to the power of 7? that number came out of no where this docent make sense

[@AnneSchmidt]

You have to change nm to m in order to use the speed of light constant which has m per second as a unit. There are 1,000,000,000 nm in 1 m, but the given value is in the hundreds of nm. So when converted to m it has an exponent of 10 - 7 m.

[@sydney_boo6167]

I used a scientific calculator and I didn’t get 4.84 to the -19th I got 4.84 to the -33rd how do I get to the Same answer you got to?

[@AnneSchmidt]

Make sure you are using the EE key (2nd key which is blue then the comma key)not 10^x key. Also, using parentheses for each value helps.

[@lavenderlillymi]

How do gou calculate without a calculator we cant use calculator to calculate this im stuck 😭

[@AnneSchmidt]

There are rules for scientific notation adding, subtracting, multiplying and dividing. I’d you need help comment back and I can explain!

[@lavenderlillymi]

@@AnneSchmidt yes definitely Im struggling a lot in class I got a total of 15% in chemistry this is really bad and all my teachers said to quit my alevels too I need to prove them they're wrong!!!! I'm determined to get what I want !!

[@AnneSchmidt]

Hope all is well and you reached your goals for the class!

[@user-ti1up9fz2t]

That was too quick 😭

[@AnneSchmidt]

Slowing down the video is an option. Or watch it twice.