Need Help (1 Viewer)

[MrBLuEyEs]

Hey my friend doesn't have a pc and is having trouble with a physics question so i thought i would ask u guys as im not much help, i hate physics.

Given that waves in the following table
(gamma ray, x ray, blue light, microwave, fm radio wave) travel at 3 times 10 to the power of 8 ms to the power of -1 in a vacum, find the wavelength period and frequency

If u could help i would appreciate it heaps, if not it's alright.

 

[martin310015]

i think that for different electromagnetic wave it has a different frquency u have to check it out in text books then u can use the v=wavelenght/period=frequency x wavelenght to work it out. which v=3x10^8 s^-1

 

[+:: $i[Q]u3 ::+]

yep.. the waves u have there are all electromagnetic waves. They travel at hte same speed in a vacuum: i.e. speed of light
c=3.0x10^8ms^(-1)
but speed of light c = f x lamda
where f = frequency of hte wave
lamda = wavelength.
gamma rays have higher frequencies and short wavelenths, whereas radio waves have lower frequencies and very long wavelengths. You need data for either freqency or wavelength to do that problem.
period T = 1/f so u should be able to calculate it from the freuqncy of the wave.