IN the discussion which followed Prof. Lippmann's splendidly interesting communication to the Royal Society (April 23), on colour photography, I suggested the possibility of applying his method to the ...

The film explores the properties of sound waves in air, demonstrating that sound travels at approximately 1,100 feet per second and reflects similarly to light. Through experiments using echoes, beams ...

The film demonstrates the principles of optics, particularly how light behaves and interacts with objects. It explains that light travels in straight lines, which is evident in the formation of sharp ...