Explains the concept of light traveling in straight lines and demonstrates this through various experiments. It shows how light can be observed through holes in cards, how it behaves in a lightproof ...

I test a series of light experiments to explore reflection, refraction, and optical illusions, demonstrating how light behaves in surprising and educational ways. Denmark facing "decisive moment" over ...

IN continuation of some experiments which were described in NATURE, vol. xxxix. p. 391 (“Repetition of Hertz's Experiments and Determination of the Direction of the Vibration of Light”) attempts were ...

THE experimental and theoretical investigations of the last twenty years have lent a new interest to what, I venture to think, is one of the most fascinating branches of physical optics, namely, the ...