## Topic 1A #3

$c=\lambda v$

AlyssaBei_1F
Posts: 99
Joined: Fri Sep 28, 2018 12:17 am

### Topic 1A #3

I am confused on this problem. To find out all the parts (a,b,c,d) do we only use the equation E=hv or do we need to use another equation also?

Kobe_Wright
Posts: 83
Joined: Fri Sep 28, 2018 12:16 am

### Re: Topic 1A #3

I am unsure as to what book and problem you are referring to, I think the rules are that we need to post the full problem in context.

Olivia Young 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

### Re: Topic 1A #3

I am also unsure of which book edition you are referring to, but if your question is on the 7th Edition Topic 1A.3 exercise, then you would need to use the E=hv equation and the c=v*wavelength equation. For part (a), you would only need to use c+v*wavelength, yet remember that all electromagnetic radiation travels at the same speed of light, c. For part (b), you would need to use the equation c=v*wavelength again. For part (c), you would need to recognize that "the extent of change in the electrical field" is referring to wave amplitude and slope, therefore you would use the c=v*wavelength equation. For part (d), you must use the E=hv equation, while utilizing Planck's constant. Hope this helps!

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