Black body for quiz 2  [ENDORSED]

(Wien's law: )

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Derek Waters 1A
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Black body for quiz 2

Postby Derek Waters 1A » Sat Oct 14, 2017 11:31 pm

So black body and it’s wiens law are not needed for quiz 2 right?

Yifei Wang 3G
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Re: Black body for quiz 2

Postby Yifei Wang 3G » Sun Oct 15, 2017 12:03 am

Actually test 2 covers Chapter 1 up to the end of section 1.5. Black body and wien's law are in 1.4 so they maybe will appear in test 2

Christy Lee 2H
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Re: Black body for quiz 2

Postby Christy Lee 2H » Sun Oct 15, 2017 12:14 pm

I am pretty sure Dr. Lavelle said we would not be covering black bodies, so you will not need to know Wien's law or Stephen Boltzmann law.

Rebecca Doan 2L
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Re: Black body for quiz 2

Postby Rebecca Doan 2L » Sun Oct 15, 2017 9:50 pm

He did not go over it during lecture very much, so I am sure it is not needed for the test.

Peter Dis1G
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Re: Black body for quiz 2

Postby Peter Dis1G » Mon Oct 16, 2017 7:09 am

But overall,it's still an important concept.I recommend looking at it even if not tested.

Sam Smoot 2L
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Re: Black body for quiz 2

Postby Sam Smoot 2L » Mon Oct 16, 2017 3:12 pm

I am pretty sure we were told we will not be tested on blackbody radiation, but it is an important concept for understanding the chapter overall.

Jasmine Botello 2F
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Re: Black body for quiz 2

Postby Jasmine Botello 2F » Mon Oct 16, 2017 6:59 pm

Dr. Lavelle told our lecture that we did not have to worry about black bodies for this upcoming test.

aTirumalai-1I
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Re: Black body for quiz 2

Postby aTirumalai-1I » Wed Oct 18, 2017 4:03 pm

I know we don't have to know Wien's law for Test 2, but I had a question regarding significant digits for the textbook's example problem 1.3 displaying Wien's law:

"The maximum intensity of solar radiation occurs at 490. nm. What is the temperature of the surface of the Sun?"

The only value given in this problem is 490. with 3 sig figs. Why then is the answer to this problem 5.9 x 10^3 K with only 2 significant figures?

kaitlindaugherty3L
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Re: Black body for quiz 2

Postby kaitlindaugherty3L » Thu Oct 19, 2017 3:41 pm

According to what Dr. LaVelle said in class, all we need to know for black body radiation is that atoms and molecules usually only absorb or emit unique frequencies that are allowed by their unique electron structure, but black bodies (hypothetically) absorb or emit all frequencies.

Chem_Mod
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Re: Black body for quiz 2  [ENDORSED]

Postby Chem_Mod » Thu Oct 19, 2017 4:00 pm

kaitlindaugherty3L wrote:According to what Dr. LaVelle said in class, all we need to know for black body radiation is that atoms and molecules usually only absorb or emit unique frequencies that are allowed by their unique electron structure, but black bodies (hypothetically) absorb or emit all frequencies.


Correct and well stated. Introduce yourself at the end of class.

lnlyzelda_3J
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Re: Black body for quiz 2

Postby lnlyzelda_3J » Thu Oct 19, 2017 4:09 pm

Test 2 will only include chapter 1 up until section 1.5 with the exception of calculating black bodies, correct?

3J

Chem_Mod
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Re: Black body for quiz 2

Postby Chem_Mod » Thu Oct 19, 2017 7:47 pm

lnlyzelda_3J wrote:Test 2 will only include chapter 1 up until section 1.5 with the exception of calculating black bodies, correct?

3J


Correct. As I have announced many times in class.


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