2006-08-29 02:35:47 · 18 answers · asked by vijay4118 2 in Science & Mathematics ➔ Physics
if light is a arrey of photons . photon is paticals and have a mass also . can we apply all rules of partical beheaviar ?
2006-08-29 02:54:37 · update #1
In a vacuum all wavelengths travel at the same speed. In anything else, the speed of light is 'slowed down' by the refractive index of the material. And the refractive index is frequently a function of wavelength (this is a material characteristic called 'dispersion')
It's the reason that cheap cameras frequently have a red or blue 'halo' around an image. The focal point actually varies as a function of wavelength.
Doug
2006-08-29 02:43:16 · answer #1 · answered by doug_donaghue 7 · 2⤊ 1⤋
The speed of light is not changed for color. Color is a function of wavelength. Wavelength differences are responsible for the colors of the rainbow. Photons have no mass but they do have energy. *The red shift is is a measured change in the frequency and wavelength, (also called the Doppler Shift) for increasing distances, or an object moving away from the observer..
The blue shift is a measure of shorter wavelengths, as an object is coming closer, or moving towards the observer.
The value for the speed of light is 2.99 x10^8 and that value is unchanged in free space or a vacuum.
However, when light passes through another medium, it's velocity depends on the Refractive Index of the medium it is passing through.
The formulas is:
v (subscript n) = c / n where n = the index
This is called Huygens Principle
2006-09-05 04:48:32 · answer #2 · answered by nammy_410 2 · 0⤊ 0⤋
No the energy changes not the speed. However the refractive index can change with wavelength this is chromatic abberations in a lens. Photons have zero mass but do have energy.
2006-08-29 04:55:26 · answer #3 · answered by Chris C 2 · 0⤊ 1⤋
Logic is correct, the wave length differs, but the speed remains the same in a vacuum. Other forms of radiation, such as microwaves and radio waves also travel at the speed of light, but differ in wavelength, amplitude, and frequency.
2006-08-29 02:48:45 · answer #4 · answered by Wayne D 3 · 0⤊ 1⤋
No, speed of light for different colour is same but the wave length differs.
2006-09-06 00:16:15 · answer #5 · answered by Billu Mastan 1 · 0⤊ 0⤋
Red and purple has the biggest difference in wavelength... Just do it like the rainbow.. It's the sequence of the wavelength... But I don;t think that speed of light will differ too...
2006-08-29 02:40:37 · answer #6 · answered by Logic + 1 · 0⤊ 1⤋
You cannot apply all the rules of particle behavior. The speeds are not different. (And differences in speeds have nothing to do with red sunsets, or why rainbows are formed.)
2006-09-05 03:22:52 · answer #7 · answered by metatron 4 · 0⤊ 0⤋
photons have no mass. the mass of photons at rest has never been measured because photons always travel at the speed of light, c.
this is true of all photons, independently of wavelength, i.e. it is true for all colours, but also for radio waves, television signals, mobile phone signals, wi-fi, microwaves in an oven, x-rays, gamma rays, you name it.
hope this helps
a
2006-08-29 03:44:49 · answer #8 · answered by AntoineBachmann 5 · 0⤊ 1⤋
Speed of light is same for all colour of light. Only the frequency & wavelength differs for different colour of light.
2006-08-29 02:41:19 · answer #9 · answered by shank77_23 1 · 0⤊ 1⤋
Speed of light is always the same, though wavelength changes.
2006-09-05 16:31:14 · answer #10 · answered by Penguin Five 2 · 0⤊ 0⤋