[hsc]

光速在真空是常數
但穿過玻璃時會慢了
那麼,在玻璃內的時間是否也慢了呢

[d2c]

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[pongyee]

>> 但穿過玻璃時會慢了

真的嗎？

[maximilianyuen]

http://www.dcfever.com/forum/read.php?f=1&i=648250&t=648250&phorum_auth=09562b1e4e8568609af39fe8688fbe9c


Interaction with transparent materials


The refractive index of a material indicates how much slower the speed of light is in that medium than in a vacuum. The slower speed of light in materials can cause refraction, as demonstrated by this prism (in the case of a prism splitting white light into a spectrum of colours, the refraction is known as dispersion).
In passing through materials, the observed speed of light can differ from c. The ratio of c to the phase velocity of light in the material is called the refractive index. The speed of light in air is only slightly less than c. Denser media, such as water and glass, can slow light much more, to fractions such as and of c. Through diamond, light is much slower—only about 124,000 kilometres per second, less than of c.

[hsc]

咁即係在玻璃內,時間比在空氣中慢啦
空氣中的時間又比真空慢啦

[maximilianyuen]

one question:

is the actual speed of light = speed of time?

and now are you suggesting the time in glass and water is slower than air, and on Earth the time slower than space?

[d2c]

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[alamwuhk2a]

光在牆前停下 -> 光速in牆 = 0

咁"牆入面o既時間" 係無限大?!

[d2c]

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[oly750]

呢個問題相當於倚天屠龍記入面既乾坤大挪移, 無人可以鍊到第九重, 當你鍊到第八重已經 short 左, 所以全世界只有幾個人明白呢個理論, 何必咁認真討論?
就算時間真的有差別, 也只不過0.1(n次方) 秒, 你察覺到嗎?

e-mc(2次方), 我怎樣看也看不出跟時間有什麼關係

[王迦南]

光進入玻璃是否慢了關我叉事咩！

但我進入肥花荷包就肯定輕咗…

[oly750]

更正: 應該係e=mc(2次方)

[d2c]

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[kingkonghk]

光速還光速, 時間還時間, 2樣野來

人o係水入面行得慢

咁水o既時間係唔係慢?

[怪俠]

神州太空人都好慢，咁太空嘅時間慢唔慢？