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It wouldnt change by that much. The refractive index of ice at 778 nm at -40 C according to mathematica link is n = 1.30534.

using this value of wavelength and the angles cited, then the calculated giza vlaue is 1.299908 which is still 1.2999 to 4 decimal places.

Jonny

This post was created using 100% recycled electrons

using this value of wavelength and the angles cited, then the calculated giza vlaue is 1.299908 which is still 1.2999 to 4 decimal places.

Jonny

This post was created using 100% recycled electrons

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