Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

Consider that light consists in the vibrations of the ether, whereby the nerves of the eye are stimulated and vision is produced. Now, though the vibrations of the ether exist both in the lamp and in the sun, yet what a difference there is between the light of the sun and that of the stars or of the lamp! (37:12)

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