Homework Help: Physics

Posted by Olivia on Tuesday, September 9, 2008 at 5:44pm.

Ok so I think I have this correct, but I'm not sure.

The question is: what is the frequency of green light, which has a wavelength of 4.90 x 10 ^-7 m?

Since all electromagnetic waves travel at
3.00 x 10^8 m/s (c), and
c= wavelength x frequency,

The problem is:
(3.00 x 10^8) / (4.90 x 10^-7) = frequency

Right?

I got .61 x 10^15 as a result.

Is this right?

Physics - bobpursley, Tuesday, September 9, 2008 at 5:46pm
Yes, but I would put it in scientific notation 6.1 x 10^14 hz
- Physics - DrBob222, Tuesday, September 9, 2008 at 5:51pm
  In addition to putting it in scientific notation as Bob Pursley suggested, I would add another place. You have three significant figures in 4.90 and 3 s.f. in 3.00; therefore, you are allowed 3 in the answer or 6.12 x 10^14 Hz.

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