A particular infrared signal is detected with frequency of 1.20x10^13 Hz. What is its wavelength? [Use the special boxes for entering scientific notation, not the "E" notation. Make sure your mantissa (the first part) is a number between 1.000 and 9.999. As usual, use SI units.]
2006-10-15 15:26:56 · 4 answers · asked by bri 1 in Science & Mathematics ➔ Astronomy & Space
Wavelength = c / Frequency.
where c is the speed of light.
Write the result in scientific notation x.xxxxEzy meter
2006-10-15 15:40:34 · answer #1 · answered by Dr. J. 6 · 0⤊ 0⤋
The first responder was actually giving you the PERIOD. Hertz is 1/second, so the inverse of that is the period.
Wavelength requires a length, as well as getting rid of the 1/s. Thus, c/frequency results in a quantity that has a dimension of length and is therefore a wavelength.
2006-10-16 01:01:15 · answer #2 · answered by arbiter007 6 · 0⤊ 0⤋
for any wave
v = λf
where v is velocity, λ is wave length and f is frequency
for the infra red signals
v = c (velocity of light)= 3 * 10^8 m/s
so
λ= c / f
λ = 3*10^8 / 1.2*10^13 = 0.000025 = 25 * 10 ^ -6 m
λ = 25μm
2006-10-15 22:34:33 · answer #3 · answered by M. Abuhelwa 5 · 0⤊ 0⤋
Easy, wavelength is 1 divided frequency.
2006-10-15 22:32:01 · answer #4 · answered by Anonymous · 0⤊ 1⤋