Science & Space :  The Official GrahamHancock.com forums
For all that is Scientifically related to Cosmology and Space. (NB: Please take discussions about UFOs, possible Alien contact, Crop-Circles, Alien Abductions, Planet-X and Niburu to the ‘Paranormal and Supernatural’ Message Board). 
Welcome! Log InRegister
As explained in a previous reply there are values of wavelength for which n = 1.2999 for ice at -40 C, but the problem is the angles would most likely have to be different.

However, we can look at it this way. If we assume that n(2) = 1.2999, and that the angles are as given, we can calculate what the refractive index of the air must be to produce this result (i.e. n(1)).

We find that the refractive index of air must be 1.000329699. This implies that the wavelength of light must be greater than 1250 nm (since this is the highest i can calculate for you using the Mathematica program i linked to). The refractive index of air is less than 1.000333994 above 1250 nm. However, I may be able to find an approximate wavelength for you later as it by fitting data points and extrapolating to higher wavelengths. BUT the refractive index of air must be either 8222, 12109, 30826, or 46423.5 nm (we have excluded the 84.815 and 1095 values) since these are the wavelengths that produce a refractive index of ice at -40 C of n(2) = 1.2999. Thus, if the extrapolated wavelength is not at these values, then there is no wavelength that can be used to produce the required angles for air and ice at - 40C.

Jonny




This post was created using 100% recycled electrons

Options: ReplyQuote


Subject Views Written By Posted
Totally confused on The Periodic Table 1172 Ahatmose 05-Feb-12 03:39
Re: Totally confused on The Periodic Table 392 JonnyMcA 05-Feb-12 09:55
Re: Totally confused on The Periodic Table 278 Ahatmose 05-Feb-12 14:57
Re: Totally confused on The Periodic Table 364 JonnyMcA 05-Feb-12 15:52
Re: Totally confused on The Periodic Table 353 JonnyMcA 05-Feb-12 16:01
Re: Totally confused on The Periodic Table 316 Ahatmose 06-Feb-12 03:10
Re: Totally confused on The Periodic Table 317 JonnyMcA 06-Feb-12 18:26
Re: Totally confused on The Periodic Table 337 Spiros 05-Feb-12 22:00
Re: Totally confused on The Periodic Table 345 JonnyMcA 05-Feb-12 22:47
Re: Totally confused on The Periodic Table 336 Spiros 07-Feb-12 22:40
Re: Totally confused on The Periodic Table 338 Susan Doris 06-Feb-12 08:43
Re: Jonny/Ahatmose 369 Thunderbird 08-Feb-12 03:02
Index of Refraction 392 Ahatmose 09-Feb-12 03:08
Re: Index of Refraction 360 Ahatmose 09-Feb-12 03:25
Re: Index of Refraction 1347 JonnyMcA 09-Feb-12 08:34
Re: Index of Refraction 367 Ahatmose 09-Feb-12 16:10
Index of Refraction: The solution ? 413 Ahatmose 09-Feb-12 17:41
Re: Index of Refraction: The solution ? 369 JonnyMcA 11-Feb-12 09:03
Re: Index of Refraction 362 JonnyMcA 11-Feb-12 08:59
Re: Index of Refraction 350 Ahatmose 11-Feb-12 12:29
Re: Index of Refraction 406 JonnyMcA 11-Feb-12 14:12
Re: Index of Refraction 356 Ahatmose 12-Feb-12 13:11
Addendum: Index of Refraction 342 Ahatmose 12-Feb-12 13:19
Second Addendum: Index of Refraction 294 Ahatmose 12-Feb-12 13:26
Third Addendum: Index of Refraction 323 Ahatmose 12-Feb-12 13:32
Re: Third Addendum: Index of Refraction 330 JonnyMcA 12-Feb-12 16:03
Re: Third Addendum: Index of Refraction 341 JonnyMcA 12-Feb-12 21:17
Re: Second Addendum: Index of Refraction 349 JonnyMcA 12-Feb-12 15:40
Re: Addendum: Index of Refraction 331 JonnyMcA 12-Feb-12 15:34
Re: Index of Refraction 393 JonnyMcA 12-Feb-12 13:30
Re: Index of Refraction 328 Ahatmose 12-Feb-12 13:48
Re: Index of Refraction 340 JonnyMcA 12-Feb-12 15:32
Re: Index of Refraction 347 Ahatmose 13-Feb-12 01:23
Re: Index of Refraction 392 JonnyMcA 13-Feb-12 08:23
Re: Index of Refraction 373 Ahatmose 13-Feb-12 16:01
Re: Index of Refraction 370 JonnyMcA 13-Feb-12 19:01
Re: Index of Refraction 345 Ahatmose 13-Feb-12 16:47
Re: Index of Refraction 330 JonnyMcA 13-Feb-12 19:07
Re: Index of Refraction 340 Ahatmose 13-Feb-12 17:37
Re: Index of Refraction 331 JonnyMcA 13-Feb-12 19:20
Re: Index of Refraction 469 Spiros 05-Apr-18 14:20
Talk about stretching credibility: Index of Refraction 356 Ahatmose 13-Feb-12 05:48


Sorry, only registered users may post in this forum.