Asked by emily
Red light with a wavelength of 7.0x10^-7 m travels at a speed of c. When it enters glass it's speed is reduced to 2.0x10^8 m/s. Calculate the wavelength of this redlight in glass. Assume that the frequency does not change.
I'm really confused and I'm not sure how to do this question. Thank you!
I'm really confused and I'm not sure how to do this question. Thank you!
Answers
Answered by
emily
Ohh wait never mind.
Would it be
TIME = 7.0x10^-7 m / 2.0x10^8 m/s
=35s
And then you would plug it in as f=1/35s?
Would it be
TIME = 7.0x10^-7 m / 2.0x10^8 m/s
=35s
And then you would plug it in as f=1/35s?
Answered by
Steve
watch the units
wavelength(m) = speed(m/s) / frequency(1/s)
wavelength(m) = speed(m/s) / frequency(1/s)
Answered by
emily
I don't understand. So is the 35s part not right?
Because then you could plug it into the f=1/t formula.
Because then you could plug it into the f=1/t formula.
Answered by
bobpursley
It should be 0.35 seconds, shouldn't it?
Answered by
emily
Oh wait I see, so then do you use the v=fx so solve for the frequency?
Like
2.0x10^8 m/s = 7.0x10^-7 m f
And then use that frequency to find the new wavelength?
Like
2.0x10^8 m/s = 7.0x10^-7 m f
And then use that frequency to find the new wavelength?
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.