Prabhupāda: But that's all... But why the color should change? That is point. You may move...
Tamāla Kṛṣṇa: Because, he's explaining, that light is seen when it bends... White light when it bends at different angles...
Prabhupāda: That is only applicable when you accept that the sun is moving. Therefore atmosphere is going...
Tamāla Kṛṣṇa: No, the earth is moving.
Jagadīśa: They say the earth is turning. Therefore at a certain point the sun is actually below the horizon, but part of the sun's light, the red spectral, the red light of the sun, comes over the horizon and so the sun appears...
Tamāla Kṛṣṇa: Red, but actually it's not reddish; it's white or yellow, whatever.
Prabhupāda: Actually it is white, that's all right, but if you see one fixed thing, a color, practical experience is the color does not change if it is fixed up.
Tamāla Kṛṣṇa: Supposing you are... Supposing there's a white light, and you are situated here, and in front of you is a screen with many colors, and you are moving different ways along this screen. Sometimes you are looking through a green, sometimes... in that way although the light is fixed up, because you are moving behind different colors...
Prabhupāda: So where is that screen?
Jagadīśa: That's called the spectrum.
Prabhupāda: Spectrum. So where is that? That is also finished?
Hṛdayānanda: The atmosphere is.